Mac keeps on suggesting an update

Hello,

I have an issue with updating to Catalinf 10.15.7. When the update appeared I downloaded and installed it. However, even after the restart a notification appears on Settings and it suggests that there is an update available. I press “update now”, a windows pops up and reads “to update, you must restart your Mac”. I do restart it and everything it brings me to my starting point. Any suggestions how to fix this?