Some tips for managing minor planets

[theskyhound]

Your minor planet database was corrupted, likely because of being a beta tester some time ago. It cannot be fixed via observing lists. Observing lists just refer to the object in the minor planet database. If that object is gone, it will no longer refer to the correct minor planet. This is not something that normally happens, and if it does, restoring a backup is intended to be the best way to fix it.

Regarding threading: I already answered you on this. I have work to do!