Quote:
Originally Posted by ownedbycats
Question: Will links remain intact if an older version of Calibre is run?
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Probably. If you don't touch the db table representing the category item then they will not be changed. For example, editing a category should work in cases where the database table row survives the operation, such as item renames to something that doesn't already exist. I don't know for renames that force merges or case changes. Copy to library might present issues. DB Recovery will certainly not recover the links.
Another possibility: there might be instances where the upgraded db version causes problems. I don't know of any but that doesn't mean a lot. Over the years Kovid did a lot of work to ensure that running a version of calibre expecting db version X wouldn't break db version X+n. That said, it happens especially with db triggers.
Plugins are another story. If a plugin reads or modifies the db directly then who know what will happen.
Personally, I would avoid the problem if possible.