this is a bug that probably will be fixed, or has been fixed.
The last Module slot (6th) when PET gains level 9, costs 0 uridium.
It should cost 50k Uridium.
Obviously, this bug has allready been told to DO support, and I myself have no way to duble check it, since my PET is allready passed level 9 and that slot was opened for free
Greetings, SERAPH.
