How to deal with error memory?

Hello guys, I got VCDS. Today I reset the service display and read out the error memory. There were three errors in it. A four-year-old (unplausible signal from the transmission), one from three months ago (pre-glow system) and one from yesterday (difference pressure sensor unplausible signal). All sporadic. The two older errors are probably of no significance and were one-time events, but the one from yesterday requires observation. What do you do with the errors? Do you want to delete them and see if they’re coming back?