If Calibre has no entry, how does it know what to open?
Errors can go both ways (because of events outside Calibre).
Book Formats that are in folders that Calibre does not acknowledge (listed in the MDE).
Books Calibre thinks it has a FORMAT, but it is missing in the folder it was supposed to be. (The entire folder could be missing)
Calibre can store non-book formats. Calibre can have Empty Book entries (no formats, just the entry (metadata +cover ). The formats box has to agree with what is actually present in the folder to consider the record, error free
BTW If you have 2 copies, the folder will have a different ID title (id)
Note {ID} is not visible in the MDE. It IS visible in the Details Pane
ID is not to be confused with Identifiers (abbr Ids in the MDE)
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