Oracle Message ORA-16236 - Logical Standby metadata operation in progress

ERRORLogical Standby metadata operation in progress
CAUSEThe requested operation failed because a Logical Standby metadata operation, such as DBMS_LOGSTDBY.SET_TABLESPACE or DBMS_LOGSTDBY.INSTANTIATE_TABLE, has not finished.
ACTIONWait for the Logical Standby metadata operation to finish, then re-enter or respecify the operation.