ORA-25109: standby lock name space has illegal character 'string'
Cause: An invalid lock name space was specified for the standby database. The lock name space for the standby database can only contain A-Z, 0-9, '_', '#', 'Action: Change initialization parameter _STANDBY_LOCK_NAME_SPACE to a valid character stringhttps://support.oracle.com/
http://www.oracle.com/, '.' and '@' characters
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