Hello! I'm having a problem when I restore a database (just in case: the backup was made with -meta_data option)

I'm getting this error message, but I can't find where is the RDB$INDEX_39. I use FlameRobin...


gbak: restoring SQL role: RDB$ADMIN

gbak: ERROR:attempt to store duplicate value (visible to active transactions) in unique index "RDB$INDEX_39"

gbak:Exiting before completion due to errors