Why did using Carbon Copy Cloner trigger a huge Time Machine backup?

[AllGold]

I got tired of the crapshow that is Apple's Disk Utility beyond Mavericks so I downloaded the latest version of CCC to make a clone of my APFS boot drive. Just a one-time manual clone.

Now Time Machine thinks pretty much everything on my boot drive needs to be backed up. Is CCC to blame for this? How? Why?

I couldn't find anything like this problem in an online search.