Avoid SQL Server 2019 Cumulative Update #7
After releasing Cumulative Update #7 on September 2nd, Microsoft has discovered an issue with snapshot generation that was critical enough for them to pull the CU.
What you need to know:
If you haven't installed CU7 yet
If you have installed CU7
Uninstall it, unless you don't plan to create any snapshots (or run
CHECKDB) before applying CU8.
If you have created snapshots since installing CU7, drop them.