Pikaboom

hey guys ! i've got 2 problems , hopefully someone could give me a hand on it. #1 i got a 6IV ditto from tera cave (no savedata edited) and whenever i tried to reroll the PID for the ditto in PKHex , it shows that "unable to match an encounter from origin game" is it possible that some Gen9 pokemon's PID are somehow related to their IV and nature? #2 its really weird that i couldn't find any 6IV Dittos in the encounter database (its like maximun only 5IV) then i tried to modified the IV manually , in result it shows ""unable to match an encounter from origin game" again just wondering if there's anyway to generate a 6IV Ditto from encounter database whitch is met in tera cave! plz help me ! thanks a lot !