"Duplicate Domain Name. Please set a unique one." --> Domain names are not unique across all companies IRL

[pombredanne]

Bug Description

Adding two companies that are in the same group and share the same domain name yields:

Duplicate Domain Name. Please set a unique one.

It does not make sense. Many large multinational companies only have a single domain for a badzillion companies.

[FelixMalfait]

Good feedback, we need to give more flexibility on unicity constraints. We also had a similar feedback by @ssommerfeldt
on #9920.

I don't think this will be tackled in the very near term, but definitely something we should do this year