Field 12 is 'controller'. I did a little poking around in the backup docs but couldn't make sense of exactly what that was or what a typical result in that field should look like.
Gee ... can't count! Anyway ... in looking at that table for a 2.4.3+ and a site that hasn't had the same issue, that field is 'blank' ... ie, contains no data.
'spirit of sharing', Ken