Oracle Message RMAN-06189 - current DBID number does not match target mounted database (number)

ERRORcurrent DBID number does not match target mounted database (number)
CAUSESET DBID was used to set a DBID that does not match the DBID of the database to which RMAN is connected.
ACTIONIf the current operation is a restore to copy the database, do not mount the database. Otherwise, avoid using the SET DBID command, or restart RMAN.