I have a problem.
Spanish comics: Mortadelo y Filemon. https://colnect.com/en/comics/list/coun ... ode/ES-MYF .
Same collection name, two different publishers.
When the catalog codes were created, the publishers were not differentiated.
Until now no two codes had coincided the same. But ...
I'm preparing a new nif and ...
In the catalog there https://colnect.com/en/comics/comic/368 ... _MYF-Spain
and I have to upload 
This should have the same catalog number. ES-MYF-091 This is not possible.
Perhaps the codes of one or other publisher would have to be modified.
