IBT On a2 but eligible for A

Bit of a strange one, but I did my IBT on an a2 bike but haven’t done the test yet. I am 24 so qualify to go direct IBT on A. Because I have done it on an A2 , do I have to do the test now on the A2? Or can I do the extra module now and bump up to an A even tho I’m on a provisional a2 and have IBT done on a2?

Hopefully I explained that right sorry for any confusion!