step 1. request tac to enable the remaining 1million plus... looks like they given you free licensing..... just kidding.
I have a similiar problem were we used evaluation licensing to perform the migration from other infrastucture to new AOS 8 to bypass having to track and turn in licensing. When i went to delete the expired evaluation license no joy. SE confirmed the olny way to delete them is to write erase the standalone or mm. Now it would be nice if the platform didn't count expired licensing in the overall total license count.