We have a database that will not restore.

We have the GDB which we back up to a GBK then when trying to restore
the database we get the below error.


gbak: restoring index RDB$PRIMARY270
attempt to store duplicate value (visible to active transactions) in
unique index "RDB$PRIMARY252"

How can we initially identify the problem.
We would like our system to automatically fix itself up.
Has anyone ever done this?

Regards,

Robert.