Have XPRO SN for new computer-but install looking for qualifying 7,8,9 which I never had

I purchased Acrobat X Pro years ago and have two valid licenses. ..mistakenly paid TWICE!!! One of the SN's seems to work just fine., the other one not at all. However, after I enter the "good" SN, the installer prompts for a qualifying older version (7, 8, or 9), which I do not have. I previously owned Acrobat Standard X, but it doesn’t seem to qualify.

I am not looking to upgrade or purchase a new version—just to activate the software I already paid for. Can you verify my license and provide a workaround or activation method that doesn’t require an older serial number?

I even deactivated on one computer hoping that would help. It is running perfectly fine on windows 11 in one other computer I purchased long after I had the proper SN. I have some recollection of having this issue then, which was a few years ago. The resolution required a phone call with a tech to resolve. Please allow me to contact you by phone? I don't want to post my SN here. 

Thanks,

Barbara