Gate2, I'm raising this as a bug because I have no reason to believe that a guild member has released this sector. Not sure exactly what status is needed to release a HQ - I have founder status, a further player has Leader status and an additional one is trusted. The LMA log doesn't show that any of us released any sectors. Unless you're able to show otherwise I believe that the sector was incorrectly released by the system. I did notice that the guild who we took the sector from also held a sector at 7,29 and that has also gone back to NPC - the two could be related.