diff --git a/ngcp-update-db-schema b/ngcp-update-db-schema
index 9498b988..ebc92f52 100755
--- a/ngcp-update-db-schema
+++ b/ngcp-update-db-schema
@@ -54,7 +54,7 @@ declare -a MYSQL_OPTS=()
 MYSQL_OPTS+=("--defaults-extra-file=${SIPWISE_EXTRA_CNF}")
 
 # check connection with sipwise user
-if ! mysql "${MYSQL_OPTS[@]}" -e 'SELECT 1;' 1>/dev/null 2>/dev/null ; then
+if ! mysql "${MYSQL_OPTS[@]}" -e 'SELECT 1;' &>/dev/null ; then
   echo "Error: can't connect to local MariaDB port 3306 using '${SIPWISE_EXTRA_CNF}'" >&2
   exit 1
 fi
@@ -250,6 +250,19 @@ revision_wrapper $(printf '%s\0' *.up | sort -z -n | while IFS= read -r -d "" fi
 
 # for carrier prx* hosts sync master-slave replication for not_replicated statements (if any)
 if $RUN_SYNC_DB && ($NOT_REPLICATED_REV_APPLIED || [ -n "$AUTOMATED_INSTALL_MODE" ]); then
+
+  # check connection to MariaDB on port 3308 using socket to bypass auth as root has invalid password
+  if ! mysql -S /run/mysqld/mysqld2.sock -e 'SELECT 1;' &>/dev/null ; then
+    echo "Error: can't connect to local MariaDB:3308 using socket '/run/mysqld/mysqld2.sock'" >&2
+    exit 1
+  fi
+
+  # Reset 'root' password temporary to allow ngcp-sync-db replicate all credentials from db01
+  if ! mysql -S /run/mysqld/mysqld2.sock -e "SET PASSWORD FOR root@localhost = '';" 2>/dev/null ; then
+    echo "Error: Failed to temporary reset password for user 'root' on MariaDB:3308" >&2
+    exit 1
+  fi
+
   if [ -x "$SYNC_DB" ] ; then
       PRX_SYNC_DBS="ngcp billing carrier kamailio provisioning prosody mysql"
       PRX_IGNORE_TABLES="kamailio.voicemail_spool"