Change Flex Time Original Detected Tempo?

When activating flex time on an audio track it looks like Logic goes by whatever tempo is currently active for the project to define what the original tempo is for that region of audio. Is there a way to tell Logic that the region has a different tempo after it has already been scanned with flex time?

I ask this because on occasion I will mix radio shows that use whole songs and I mix them in time to move with tempo changes for various songs. Sometimes I will be off by a small percentage as to what the actual bpm for a song is when activating flex time on a track. Because that is off, it won't match what the project tempo really is. I will then have to rename the original audio file to make Logic think it's a different file and then re-do the process with flex time. I would like to be able to change the source tempo for the region that has already been flex timed so that I won't have to keep re-importing the same audio to rescan it again and again with flex time.