First off, I'm not an expert but have you tried running System Diagnoses? This surely would solve the issue!
Hi @Rchwha. :smileyhappy:
AutoPreconfig is a system app. You’ll be able to adjust notifications for it etc. in Settings > Apps > Menu (3 dots, top left) > Show System Apps > AutoPreconfig (and then > Storage if you want clear the apps's cache or data).
In addition, you can use the Samsung Members app for running system diagnostics if ever you need to.