looks like someone has already been messing around on the agent set - no msb or nrd key on the set. most likely an easy change, that would explain the corruption... corruption doesn't alway happen when you change an acd set, but when it does, its can get ugly.
or if you don't think its corruption, you can try going to ld 81 and listing out all the spv set and check everyone of them to see if your agent 326 is on any other supervisor set.
you can try a sysload to clear the corruption, should fix your problem if the corruption isn't real bad