BR0069E File name %file% not unique - backup/verification not possible

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Hello gurus,

I have 2 datafiles with similar names in DB, so in backup processing I get an error message BR0069E File name %file% not unique - backup/verification not possible.

I have tried recommendation from note 17163 - BRARCHIVE/BRBACKUP messages and codes,

BR0069E File name %s not unique - backup/verification impossible.

BR0069E Dateiname %s nicht eindeutig - Sicherung/Verifikation unmoeglich.

Explanation: Because the file name is not unique, files in the backup directory could be overwritten (during a backup to disk).

Program reaction: The BRBACKUP run is terminated.

User action: Stop the database. Rename the file at operating system level. Use the SYRMGR commands to rename the file on the database.

connect internal

shutdown immediate

startup mount

alter database rename file '<file name>' to '<file name>';

alter database open;

Then restart BRBACKUP.

but when SAP started I got non-consistency data.

How can I solve this problem?

Perhaps I need to use "alter database rename datafile '<file name>' to '<file name>';"?

Thank you in advance,

Max