I have a number of prisoners getting assigned to cells which don't meet the requirements, specifically, lacking a door. This is occurring despite unoccupied cells existing which do have doors and have the same quality.
In the screenshots and the attached save (no mods), the cells on the left side aren't finished yet but some have occupants; doors are planned but haven't been built.
In the screenshots and the attached save (no mods), the cells on the left side aren't finished yet but some have occupants; doors are planned but haven't been built.