Submit to Core problem

Books Book Connect
1

I have Book1 with ISBN1.
When I duplicated this book and edit the copy, I create new Book2 with ISBN2.

If I want to submit to Core the Book2, there appears item Library->ISBN with origin ISBN1(non editable) instead of ISBN2.

2

You need to UNLINK it from Core first.

3

Thanks.

And you can release the last Slovak translation.