The same problem, that is mentioned here for the Lydia card (and looked into by @Curve_Aleca), I experience for two other prepaid cards, so I guess this a broader problem (hence making a separate topic for it).
I have noticed that (in my case) two different prepaid cards could not be added as a underlying card by me (generated new virtual number) or a friend, when before I could add these cards perfectly fine.
In my case this happens with:
DiPocket (5455 98)
Wirex (4745 03)
When trying to add I get the message:
“prepaid and gift cards cannot be added in Curve”
I also get this message when I try to add my virtual Skrill card (5295 59), but I am not sure if this card could be added before. Anyone else?
Maybe this problem has risen,
when Curve migrated their services to a new BIN database provider? As mentioned here.