Quote:
Originally Posted by squizzie
following my prior post, I realise too that I've assumed that a full update is going to work, but since you do your testing in 3.48 is it simply better for me to just roll back to that version?
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You cannot go back to 3.48. Calibre 5.x updated the database format and 3.48 is not compatible. The oldest version that is compatible is 4.23.