diff --git a/simulations/mix_lez_chat/run_simulation.sh b/simulations/mix_lez_chat/run_simulation.sh
index 41ac988..5be60b7 100755
--- a/simulations/mix_lez_chat/run_simulation.sh
+++ b/simulations/mix_lez_chat/run_simulation.sh
@@ -163,7 +163,7 @@ echo "[2/6] Deploying programs..."
 export NSSA_WALLET_HOME_DIR="$LEZ_RLN_DIR/dev"
 export WALLET_CONFIG="$NSSA_WALLET_HOME_DIR/wallet_config.json"
 export WALLET_STORAGE="$NSSA_WALLET_HOME_DIR/storage.json"
-TREE_ID_HEX="000102030405060708090a0b0c0d0e0f1011121314151617"
+TREE_ID_HEX="000102030405060708090a0b0c0d0e0f10111213141516170000000000000000"
 GIFTER_ACCOUNT_FILE="$HOME/.logos-lez-rln/payment_account_${TREE_ID_HEX}.txt"
 
 rm -f "$WALLET_CONFIG" "$WALLET_STORAGE"
diff --git a/simulations/mix_lez_chat/setup_and_run.sh b/simulations/mix_lez_chat/setup_and_run.sh
index d93550e..15b61fc 100755
--- a/simulations/mix_lez_chat/setup_and_run.sh
+++ b/simulations/mix_lez_chat/setup_and_run.sh
@@ -65,6 +65,10 @@ fi
 log "Initializing nested submodules in vendor/logos-lez-rln..."
 (cd vendor/logos-lez-rln && \
     git submodule update --init lssa logos-delivery logos-delivery-module logos-execution-zone-module && \
+    git checkout -- . && \
+    for d in lssa logos-delivery logos-delivery-module logos-execution-zone-module; do \
+        (cd "$d" && git checkout -- .); \
+    done && \
     cd logos-delivery-module && git submodule update --init vendor/logos-delivery)
 if [ -d "${GUEST_TMP:-}" ]; then
     mkdir -p "$GUEST_DIR"