When set to True, the Locked File segment configuration property causes the LOCKEDFILE attribute on audit files, dump tapes/files, and database files (when initialized) to be set to True. The LOCKEDFILE attribute on these files must be set to False before they can be removed or overwritten. The following describes the use of the ALTER command to reset the LOCKEDFILE attribute on a file or directory:

ALTER MYFILE (LOCKEDFILE=FALSE);
ALTER MYDIR/= (LOCKEDFILE=FALSE);