Originally Posted by
LTN Phobia
I think you find that it's the OP (a GCH according to the profile) who is seated in Row 1, not his/her OH.
The OP is trying to get her (the OH) into the seat that is next to him/her and available, but the system is not letting her be allocated that seat.
That’s how I read it. This might be a case of sorting the seating at the airport, presuming they are able to override the seat block.