SQL Restore
Q.) The backed-up database has on-disk structure version 611. The server supports version 539 and cannot restore or upgrade this database. RESTORE DATABASE is terminating abnormally.
A.) This error occurs when you try to restore a SQL 2005 database BAK file to a SQL 2000 database.
Solution: You must restore SQL 2005 BAK files to a SQL 2005 or newer database.