Maps with no rings are falsely marked as unfinished
If a Record Attack run is finished with zero rings, this number is not recorded to gamedata if there is no existing record for rings for the cleared map. This is shown by the record for rings still being listed as "(none)" in the Record Attack menu. However, this causes issues if a map available in Record Attack has zero rings available - even if it is cleared, no record for rings will ever be saved, and the Statistics screen will always claim there is at least one unfinished record.
While this does not occur in vanilla, it is entirely possible in custom map packs. I know for a fact this occurs with Improper Technique Zone Act 4 - screenshots are attached.
Once again, forgive me for my lack of coding, technical, and GitLab knowledge; I am simply a normal player reporting a bug, nothing more.