Thanks. Yet another illustration that MB approach to information modeling is flawed by design. The procedure should start with capturing facts. Making sense of facts is the next step.
In the case of release labels, the facts are all logos present on the artwork – they all should be entered into the database (yes, a new entity type needs to be intoduced). Then some of the logos will be mapped to imprints, while the others will be mapped to other things like manufacturers, distributors, series, etc. Some might remain unmapped until there is enough information to interpret them.