EAN (and maybe UPC) question

[wrd]

Hi.

I came here to say this: I have noticed that when I scan a EAN barcode with the mobile app, it will sometimes not find the movie, and its frustrating.

But I am starting to doubt myself, as the movie I was going to use as an example, suddenly work. (https://www.blu-ray.com/products/?p=...on=editproduct).

So I want to ask a question instead: I have a release that seems to be identical to another release in every way, except for a new EAN-code. Is there a way to add two EAN-codes to the same release, or is that a big no-no? Do we have to duplicate the other release, and replace the EAN on the duplicate?

As an example, I want to add EAN "8717418269975" to this release:
https://www.blu-ray.com/products/?p=...on=editproduct

And what should one do when there is a slip-cover, and the EAN-code on the slip-cover differs from the ordinary blu-ray cover inside?