Seats Stuck in a 2006 Chevy Uplander

The previous owner of my 2006 Chevy Uplander removed the second row seats. When they tried to put them back in they engaged the rear brackets first instead of the front brackets. The seats are now stuck in the rear and will not come out. What can I do to remove them? Will I have to cut them out completely? The car was free from a family member, so I’m not complaining too much, but it’d be nice to have all 7 functional seats instead of 5.