“Failed to Add Card” Error when Adding Same-Numbered Card either Different Rarities to Collection

I have both the regular and rare pull versions of BT25-104, but I'm unable to add them both to My Collection.

Whenever I try to do so, only one of them registers. I'm met with a "Failed to Add Card" error message when I try to add the other one. 

Is there a way to fix this?

Thanks for the report. I believe I have identified the issue and I've pushed out a fix for it. Can you try again please? 

Genesis said:

Thanks for the report. I believe I have identified the issue and I've pushed out a fix for it. Can you try again please? 

Thank you! I just tried it again, and I can confirm it's working now.