Unfortunately this doesn't look like a bug, so I'm posting it here.
Lord Removed (6 hours, 45 minutes ago)
message to all nobles of Corsanctum
Scribes find out that due to confusion about the political (or feudal) hierarchy, Conan Ironsun, Regent of Corsanctum, Margrave of Well of Mimer is forced to relinquish his lordship. He, as Regent, cannot hold allegiance to a Duchess.
Estate Vacated (6 hours, 45 minutes ago)
message to the knights of Well of Mimer
Scribes find out that due to confusion about the political (or feudal) hierarchy, Conan Ironsun, Regent of Corsanctum, Margrave of Well of Mimer is forced to relinquish his estate. He, as Regent, cannot hold allegiance to a Margrave. These 50 % of the region are now without a knight.
What exactly is this? Can I be appointed as Lord again?