Quote:
Originally Posted by jusmee
What is the point of having two fields if they MUST contain the same value?
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This is purely a (semi) educated guess but probably one of the fields is legacy field that was used in either e-reader firmware or one of the IOS/Android apps. Sometimes its probably easier to just leave it (kinda like an appendix) than remove it and risk possible unexpected weirdness -- which would include both of them needing to be identical suggesting that both of them do get used somewhere/somehow.