The user accounts database (NET.ACC) is corrupted. The local security system is replacing the corrupted NET.ACC with the backup made at date. Any updates made to the database after this time are lost.
Any action to correct the problem should be performed on that computer. The user accounts database file is damaged, so the backup file made at the listed date is now being used. Local security is still in effect.
To update the user accounts database, retype changes made to it since the listed date.