The database was originally created under Interbase 6.02. When we switched to Linux, we backed up the database with Interbase gbak, then created it on the Linux Mint system using the Firebird gbak utility. So, essentially, the database was created about 6 months ago using Firebird 2.5.

We have been backing up the database daily using Firebird gbak 2.52. When we tried to create a testing database today from the backup, we got:

gbak: 52040 records restored
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user PUBLIC
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user PUBLIC
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user SYSDBA
gbak: restoring privilege for user PUBLIC
gbak: restoring privilege for user SYSDBA
gbak: ERROR:action cancelled by trigger (3) to preserve data integrity
gbak: ERROR: table/procedure has non-SQL security class defined
gbak:Exiting before completion due to errors

How do we fix this?