I had this legal snorlax (originated from Pokemon XD "not really mine") transferred from SWSH Home to PLA then transferred back to SWSH using Pokemon Home, traded it to a sysbot so i can add a twinkling star ribbon. however when i try to trade it back to my SWSH using Sysbot on discord, It says i can't trade it because the PK8 attachment is not legal, and cannot be traded!, tried to remove twinkling star ribbon and Hisui ribbon, and still giving me the same error. can anyone help?
Note:
Did not do anything on this pokemon aside from just adding the twinkling star ribbon.
With 0143 - Snorlax - 7537AE1754C4.pk8