Can anyone tell me why this is happening (Birth Island Shiny Deoxys)

[_SeVeR_]

I made a legal shiny deoxys in an emerald save, but when i insert it into an ultra moon save it keeps automatically reverting to original trainer when i set it in the box. I think it has something to do with my emerald sid and tid clashing with the one in ultra moon.

any help would be appreciated, thanks.

Edited November 25, 2023 by _SeVeR_

[theSLAYER]

Yeah, don’t have same TID/SID/OT across generations.