ERROR_EAN13_NOT_REFERENCED
Hi people, I have a problem with ePub and not how to fix it when it passes through the ePubCheck I get this message:
ERROR_EAN13_NOT_REFERENCED(9789870417750,/data/referentiel/updates/publishers/ar_santillana/9789870417750.epub)
If anyone knows how to fix it, please send a lifesaver. hugs
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