im not too sure about the innerworks of fbx, but suspect that a python script may be intervening with your changes.
if you have a chance, try going with the fbx webui. dont take my word, as i havent tried your way but it may make a difference.
hmm… not relevant to your screenshot but, as far as i understand you want your fbx version to stick with 25.9.2 and postgresql 15?
you may not be able to do this with the ready fbx image.
the path id try would be to install debian bookworm, hold packages for postgresql, then install a 25.9.2 version of fbx on top.
if it works upto this point, then uncheck the upgrade options in fbx software update.
not something i tried before. if theres anyone out there more experienced with apt packages, maybe they can give more input.
edit and ps. instead of going through all this, if you have any “snapshots” of your system, maybe try reverting back to fbx 25.9.2. then, uncheck the update/upgrade options in the webui. postgres is a complicated package and the upgrade may have modified your databeses to a newer version (have to check this). i dont recommend manually changing things from the terminal at this point.