ORA-00207 controlfiles are not for the same database

Cause: The database ID in the control file is not the same as the database ID in the control file used by the first instance to mount this database. Most likely one of the mounts used the wrong control file or there are two databases with the same name.

Action: Check that the control file is for the correct database and is not an old version. When using multiplexed control files, that is, more than one control file is referenced in the initialization parameter file, remove the control file name listed in the message from the initialization parameter file and restart the instance. If the message does not recur, remove the problem control file from the initialization parameter file and create another copy of the control file using a new file name in the initialization parameter file.

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