“Only one item/color combination is allowed per Wanted List“
I get this message when trying to put “have” amount in wanted list.
Why and how do I fix it ? Thanks.
That message means that, in ONE of your WL, not necessarily the one you want
to edit, there’s two lots/lines with the same item in the same colour.
AFAICT, that happens when you upload a WL (because the system prevents you from
doing it from the other pages).
So you need to find and fix that faulty WL.
You may have to use the Classic version to be able to edit the WL. Or you can
delete the entire WL (download it first, so you can edit the XML to correct it
and upload it later).