change the number in the new slot ID box, after you have changed the number click in the name box and this will then let you click save in the options.
if you don't click somewhere outside of the new id slot box,the save option won't highlight,it will be greyed out.
if you need a more detailed...
that screen pops up whenever we copy old character cards to the game.
version 1.10 of the game can't convert 1.20 cards.
it looks like you are trying to play battle arena? i think only Japanese players have access to that mode of play.
if you're not Japanese, just use the honey select 32.exe or...
Here is my alteration of user HeroG's Michelle and trisha characters. All credit to herog for uploading characters.
also huge thanks to the awesome modders out there, zeaska, belgar, stamper, EusthEnoptEron, Aastaroth, Vrl0ver, elysium and all the others!!