Hi. I can't open an e-book I've bought. The error message is E_LIC_ALREADY_FULFILLED_BY_ANOTHER_USER

Hi. I can't open an e-book I've bought.

first I've  managed to open it but without log-in ( Ihad forgotten my password), but, as i didn't manage to download the e-book on my e-reader, i've log-in, and tried to re-open it and the, it didn't open.The error message is E_LIC_ALREADY_FULFILLED_BY_ANOTHER_USER.

Thank you if you had the same problem you managed to solve

Fleur M