macOS 10.13.6 update 2019-001 reappears

Hi,

I cannot get rid of the current security update 2019-001 (see list https://support.apple.com/en-us/HT201222)

for macOS High Sierra (10.13.6). It reappears every time in the update tab of the app store after

an apparently successful update. I also tried to update via the CLI ('softwareupdate') with the same

effect.

Any clues how to solve this issue (apart from reinstalling everything)?