Oracle Error ORA-23356: masterdef recognizes a master which does not recognize the masterdef

Oracle Error Message

ORA-23356: masterdef recognizes a master which does not recognize the masterdef

Reason for the Error

Possibly drop_master_repgroup was run at a master site but remove_master_databases was not run at master definition site for that master.

Solution

Run remove_master_databases from master definition site to remove the appropriate master (see associated error messages).