So on the rules it says that you must complete the fifth stage, unlocking metal parts but metal parts are unlocked after completing 4th stage. Completing 5th unlocks 2 star metal parts but completing 4th unlocks 1 star rank metal part so can it be fixed?

Thx for reading, GFGmania

Thank you gfg. I can't currently check, but I'll take your word for it. Stage 4 it is :D