Backup Failing

[colinjack]

I am using 7.6.1 with the latest patches but my backup is failing with the following message:

Backup error.
Can't query SELECT `id`,`dom_id`,`subdom_id`,`friend_dom` FROM `hotlink_friends`: MySQLDatabaseProvider error 1054:Unknown column 'subdom_id' in 'field list'
at (MySQLDatabaseProvider::query line 282)
at (psaobsolete:SAMySQLDatabase::query line 236)

Can anybody give me clue please?

Thanks

Colin