ORA-19731: cannot apply change to unverified

admin

ORA-19731: cannotapply change to unverified plugged-in datafile string
Cause: Recoverywas not able to verify the referred datafile according to
information in the control file. Before encountering this change vector forthis file,
somehow recovery did not encounter the file conversion redo that is supposed to
verify the file. This may happen due to corrupted or incorrect control fileused for
media recovery.
Action: Usethe correct control file and continue recovery.