They'll fix it. You can't do anything with that character until they do. I have had this a few times. It's when you get over 300 items. The only way to get this is if your items glitch and a few disappear, and it says you have less then you actually do have. What they'll do is move a few items, usually cards, into your myshop inventory so you have under 300 items.
Be sure to ask them not to put fused items away if you're not sure that you have cards or etc, they did that to my Insect Hat and a few others and they reverted back to the stats image. Of course another 1:1 will get your image items back, but it's troublesome. >: