MySQL Error 3857 – ER_RPL_CANT_STOP_REPLICA_WHILE_LOCKED_BACKUP

MySQL Error Message

Cannot stop the replica SQL thread while the instance is
locked for backup. Try running `UNLOCK INSTANCE` first.

Reason for the Error

ER_RPL_CANT_STOP_REPLICA_WHILE_LOCKED_BACKUP
was added in 8.0.33.