Yep, worn out unreliable and inaccurate. Need DPICM. Excuse/replacement for maneuver. IOW done.
They repair the howitzers and replace what needs to be replaced.
155mm DPICM needs as much accuracy as 155 HE. You only get 60-odd bomblets. You get a better effect radius but not that much. Long ago it was explained to me that what you do get is a more “even” effect within that radius, if that makes sense. Also, gunpits become irrelevant. Also, vehicles become more vulnerable, even SPGs, as the bomblets are AP.
I think (we will know more after the war) there is a maintenance cycle going back and forth into Poland, where re-barrelling is done, etc.
Anyway, if they are going through that much ammo, they need the guns to do it with, so they have them. Else there wouldn’t be an ammo problem.