ORA-01276: Cannot add file string. File has an Oracle Managed Files file name.

admin

ORA-01276: Cannot add file string. File has an Oracle Managed Files file name.
Cause: An attempt was made to add to the database a datafile, log file, control
file, snapshot control file, backup control file, datafile copy, control file copy or
backuppiece with an Oracle Managed Files file name.
Action: Retry the operation with a new file name.