diff --git a/waku/waku_rln_relay/group_manager/on_chain/group_manager.nim b/waku/waku_rln_relay/group_manager/on_chain/group_manager.nim
index fd503123f..54998dcb9 100644
--- a/waku/waku_rln_relay/group_manager/on_chain/group_manager.nim
+++ b/waku/waku_rln_relay/group_manager/on_chain/group_manager.nim
@@ -177,18 +177,11 @@ method register*(
 
   try:
     let leaf = rateCommitment.toLeaf().get()
-    await g.registerBatch(@[leaf])
+    await g.atomicBatch(g.latestIndex, @[leaf])
+    g.latestIndex += MembershipIndex(1)
   except CatchableError:
     raise newException(ValueError, getCurrentExceptionMsg())
 
-method registerBatch*(
-    g: OnchainGroupManager, rateCommitments: seq[RawRateCommitment]
-): Future[void] {.async: (raises: [Exception]).} =
-  initializedGuard(g)
-
-  await g.atomicBatch(g.latestIndex, rateCommitments)
-  g.latestIndex += MembershipIndex(rateCommitments.len)
-
 method register*(
     g: OnchainGroupManager,
     identityCredential: IdentityCredential,