DIgital Editions No permission to copy error

I bought 3 ebooks. I opened 2 out of 3 on my ereader (German brand "tolino"). I authorized it there with my Adobe ID. Then I notices some issues and I wanted to check them out on my laptop. I opened the 3rd book via Adobe Digital Editions 4.5 on my Macbook. Out of laziness I clicked "Don't authorize with Adobe ID" or a similar option. I opened the book, checked for errors. Later I noticed I cannot open it on my ereader tolino, i get the errror saying sth along the lines of "license already used by another". I went back to my laptop, check how to copy the book from my laptop to my ereader. I got a "No permission to copy" error. I reauthorized twice my laptop to the same Adobe ID I have for the books on my ereader. I still get the same error. Adobe customer support sent me here, to Adobe Community, for an "expert reply" on the matter after trying out some solutions.

Please help, I would like to read this book on my ereader, but now it's openable only on my laptop.