diff --git a/waku/v2/protocol/rln/contracts/registry.go b/waku/v2/protocol/rln/contracts/registry.go
index 45772f7e..58191c3a 100644
--- a/waku/v2/protocol/rln/contracts/registry.go
+++ b/waku/v2/protocol/rln/contracts/registry.go
@@ -32,7 +32,7 @@ var (
 // RLNRegistryMetaData contains all meta data concerning the RLNRegistry contract.
 var RLNRegistryMetaData = &bind.MetaData{
 	ABI: "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_poseidonHasher\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"inputs\":[],\"name\":\"IncompatibleStorage\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"IncompatibleStorageIndex\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"NoStorageContractAvailable\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"storageAddress\",\"type\":\"address\"}],\"name\":\"StorageAlreadyExists\",\"type\":\"error\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint16\",\"name\":\"index\",\"type\":\"uint16\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"storageAddress\",\"type\":\"address\"}],\"name\":\"NewStorageContract\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"forceProgress\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"newStorage\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"nextStorageIndex\",\"outputs\":[{\"internalType\":\"uint16\",\"name\":\"\",\"type\":\"uint16\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"poseidonHasher\",\"outputs\":[{\"internalType\":\"contractIPoseidonHasher\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint16\",\"name\":\"storageIndex\",\"type\":\"uint16\"},{\"internalType\":\"uint256\",\"name\":\"commitment\",\"type\":\"uint256\"}],\"name\":\"register\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256[]\",\"name\":\"commitments\",\"type\":\"uint256[]\"}],\"name\":\"register\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint16\",\"name\":\"storageIndex\",\"type\":\"uint16\"},{\"internalType\":\"uint256[]\",\"name\":\"commitments\",\"type\":\"uint256[]\"}],\"name\":\"register\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"storageAddress\",\"type\":\"address\"}],\"name\":\"registerStorage\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint16\",\"name\":\"\",\"type\":\"uint16\"}],\"name\":\"storages\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"usingStorageIndex\",\"outputs\":[{\"internalType\":\"uint16\",\"name\":\"\",\"type\":\"uint16\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]",
-	Bin: 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 }
 
 // RLNRegistryABI is the input ABI used to generate the binding from.
diff --git a/waku/v2/protocol/rln/contracts/rln.go b/waku/v2/protocol/rln/contracts/rln.go
index d36081e1..9f1b72db 100644
--- a/waku/v2/protocol/rln/contracts/rln.go
+++ b/waku/v2/protocol/rln/contracts/rln.go
@@ -31,8 +31,8 @@ var (
 
 // RLNMetaData contains all meta data concerning the RLN contract.
 var RLNMetaData = &bind.MetaData{
-	ABI: "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_poseidonHasher\",\"type\":\"address\"},{\"internalType\":\"uint16\",\"name\":\"_contractIndex\",\"type\":\"uint16\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"inputs\":[],\"name\":\"DuplicateIdCommitment\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"FullTree\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"}],\"name\":\"InvalidIdCommitment\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"NotImplemented\",\"type\":\"error\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"MemberRegistered\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"MemberWithdrawn\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"DEPTH\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"MEMBERSHIP_DEPOSIT\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"SET_SIZE\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"contractIndex\",\"outputs\":[{\"internalType\":\"uint16\",\"name\":\"\",\"type\":\"uint16\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"deployedBlockNumber\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"idCommitmentIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"}],\"name\":\"isValidCommitment\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"members\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"poseidonHasher\",\"outputs\":[{\"internalType\":\"contractPoseidonHasher\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256[]\",\"name\":\"idCommitments\",\"type\":\"uint256[]\"}],\"name\":\"register\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"}],\"name\":\"register\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"},{\"internalType\":\"addresspayable\",\"name\":\"receiver\",\"type\":\"address\"},{\"internalType\":\"uint256[8]\",\"name\":\"proof\",\"type\":\"uint256[8]\"}],\"name\":\"slash\",\"outputs\":[],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"stakedAmounts\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"verifier\",\"outputs\":[{\"internalType\":\"contractIVerifier\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"withdraw\",\"outputs\":[],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"withdrawalBalance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\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-	Bin: 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+	ABI: "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_poseidonHasher\",\"type\":\"address\"},{\"internalType\":\"uint16\",\"name\":\"_contractIndex\",\"type\":\"uint16\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"inputs\":[],\"name\":\"DuplicateIdCommitment\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"FullTree\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"}],\"name\":\"InvalidIdCommitment\",\"type\":\"error\"},{\"inputs\":[],\"name\":\"NotImplemented\",\"type\":\"error\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"MemberRegistered\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"MemberWithdrawn\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"DEPTH\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"MEMBERSHIP_DEPOSIT\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"SET_SIZE\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"contractIndex\",\"outputs\":[{\"internalType\":\"uint16\",\"name\":\"\",\"type\":\"uint16\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"deployedBlockNumber\",\"outputs\":[{\"internalType\":\"uint32\",\"name\":\"\",\"type\":\"uint32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"idCommitmentIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"}],\"name\":\"isValidCommitment\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"memberExists\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"members\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"poseidonHasher\",\"outputs\":[{\"internalType\":\"contractPoseidonHasher\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256[]\",\"name\":\"idCommitments\",\"type\":\"uint256[]\"}],\"name\":\"register\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"}],\"name\":\"register\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"idCommitment\",\"type\":\"uint256\"},{\"internalType\":\"addresspayable\",\"name\":\"receiver\",\"type\":\"address\"},{\"internalType\":\"uint256[8]\",\"name\":\"proof\",\"type\":\"uint256[8]\"}],\"name\":\"slash\",\"outputs\":[],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"stakedAmounts\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"verifier\",\"outputs\":[{\"internalType\":\"contractIVerifier\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"withdraw\",\"outputs\":[],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"withdrawalBalance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]",
+	Bin: 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 }
 
 // RLNABI is the input ABI used to generate the binding from.
@@ -419,6 +419,37 @@ func (_RLN *RLNCallerSession) IsValidCommitment(idCommitment *big.Int) (bool, er
 	return _RLN.Contract.IsValidCommitment(&_RLN.CallOpts, idCommitment)
 }
 
+// MemberExists is a free data retrieval call binding the contract method 0x6bdcc8ab.
+//
+// Solidity: function memberExists(uint256 ) view returns(bool)
+func (_RLN *RLNCaller) MemberExists(opts *bind.CallOpts, arg0 *big.Int) (bool, error) {
+	var out []interface{}
+	err := _RLN.contract.Call(opts, &out, "memberExists", arg0)
+
+	if err != nil {
+		return *new(bool), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(bool)).(*bool)
+
+	return out0, err
+
+}
+
+// MemberExists is a free data retrieval call binding the contract method 0x6bdcc8ab.
+//
+// Solidity: function memberExists(uint256 ) view returns(bool)
+func (_RLN *RLNSession) MemberExists(arg0 *big.Int) (bool, error) {
+	return _RLN.Contract.MemberExists(&_RLN.CallOpts, arg0)
+}
+
+// MemberExists is a free data retrieval call binding the contract method 0x6bdcc8ab.
+//
+// Solidity: function memberExists(uint256 ) view returns(bool)
+func (_RLN *RLNCallerSession) MemberExists(arg0 *big.Int) (bool, error) {
+	return _RLN.Contract.MemberExists(&_RLN.CallOpts, arg0)
+}
+
 // Members is a free data retrieval call binding the contract method 0x5daf08ca.
 //
 // Solidity: function members(uint256 ) view returns(uint256)
diff --git a/waku/v2/protocol/rln/contracts/waku-rln-contract b/waku/v2/protocol/rln/contracts/waku-rln-contract
index 63a7856e..8f8dda5b 160000
--- a/waku/v2/protocol/rln/contracts/waku-rln-contract
+++ b/waku/v2/protocol/rln/contracts/waku-rln-contract
@@ -1 +1 @@
-Subproject commit 63a7856eb29f08644d1e963e3edfc2c182469257
+Subproject commit 8f8dda5b7133aa8f99cbc46804972d02c22c0155
diff --git a/waku/v2/protocol/rln/group_manager/dynamic/dynamic.go b/waku/v2/protocol/rln/group_manager/dynamic/dynamic.go
index be79ff4c..5b88b18a 100644
--- a/waku/v2/protocol/rln/group_manager/dynamic/dynamic.go
+++ b/waku/v2/protocol/rln/group_manager/dynamic/dynamic.go
@@ -135,6 +135,10 @@ func (gm *DynamicGroupManager) getMembershipFee(ctx context.Context) (*big.Int,
 	return gm.web3Config.RLNContract.MEMBERSHIPDEPOSIT(&bind.CallOpts{Context: ctx})
 }
 
+func (gm *DynamicGroupManager) memberExists(ctx context.Context, idCommitment rln.IDCommitment) (bool, error) {
+	return gm.web3Config.RLNContract.MemberExists(&bind.CallOpts{Context: ctx}, rln.Bytes32ToBigInt(idCommitment))
+}
+
 func (gm *DynamicGroupManager) Start(ctx context.Context, rlnInstance *rln.RLN, rootTracker *group_manager.MerkleRootTracker) error {
 	if gm.cancel != nil {
 		return errors.New("already started")
@@ -159,7 +163,7 @@ func (gm *DynamicGroupManager) Start(ctx context.Context, rlnInstance *rln.RLN,
 		return err
 	}
 
-	err = gm.loadCredential()
+	err = gm.loadCredential(ctx)
 	if err != nil {
 		return err
 	}
@@ -171,7 +175,7 @@ func (gm *DynamicGroupManager) Start(ctx context.Context, rlnInstance *rln.RLN,
 	return nil
 }
 
-func (gm *DynamicGroupManager) loadCredential() error {
+func (gm *DynamicGroupManager) loadCredential(ctx context.Context) error {
 	start := time.Now()
 
 	credentials, err := gm.appKeystore.GetMembershipCredentials(
@@ -187,6 +191,15 @@ func (gm *DynamicGroupManager) loadCredential() error {
 		return errors.New("no credentials available")
 	}
 
+	exists, err := gm.memberExists(ctx, credentials.IdentityCredential.IDCommitment)
+	if err != nil {
+		return err
+	}
+
+	if !exists {
+		return errors.New("the provided commitment does not have a membership")
+	}
+
 	gm.identityCredential = credentials.IdentityCredential
 
 	return nil
diff --git a/waku/v2/protocol/rln/onchain_test.go b/waku/v2/protocol/rln/onchain_test.go
index 000a780b..4b396716 100644
--- a/waku/v2/protocol/rln/onchain_test.go
+++ b/waku/v2/protocol/rln/onchain_test.go
@@ -217,7 +217,7 @@ func (s *WakuRLNRelayDynamicSuite) TestMerkleTreeConstruction() {
 	credentials1 := s.generateCredentials(rlnInstance)
 	credentials2 := s.generateCredentials(rlnInstance)
 
-	err = rlnInstance.InsertMembers(1, []rln.IDCommitment{credentials1.IDCommitment, credentials2.IDCommitment})
+	err = rlnInstance.InsertMembers(0, []rln.IDCommitment{credentials1.IDCommitment, credentials2.IDCommitment})
 	s.Require().NoError(err)
 
 	//  get the Merkle root
@@ -298,8 +298,8 @@ func (s *WakuRLNRelayDynamicSuite) TestCorrectRegistrationOfPeers() {
 	idx1 := rlnRelay1.groupManager.MembershipIndex()
 	idx2 := rlnRelay2.groupManager.MembershipIndex()
 	s.Require().NoError(err)
-	s.Require().Equal(rln.MembershipIndex(1), idx1)
-	s.Require().Equal(rln.MembershipIndex(2), idx2)
+	s.Require().Equal(rln.MembershipIndex(0), idx1)
+	s.Require().Equal(rln.MembershipIndex(1), idx2)
 }
 
 func (s *WakuRLNRelayDynamicSuite) tmpKeystorePath() string {