trinket Fotgotten Seal
If you ask real nice for support assistance they should be able to help you.
But you really should read up on the trinkets mate, that one is unsalvageble and unforgable so why would you put poly-luminicscent infusions in it to begin with?
I think the Upgrade Extractor from the gem store should be usable. Haven’t tried myself though.
Possibly this wiki entry has info that can help.