False duplicate relationship
In our case, we use the description to define the job title so we want to have the history of the different job title over time. I see no reason why we couldn't have multiple inactive employer relationship with the same organisation and only one active at a time.
It's not possible to create 2 relationship of the same type with the same contacts even if the other one is disabled.
Message when creating a new SymbioTIC employer relationship on the contact (with an inactive relationship) :
On the other hand, if we have a start and/or end date on the relationship, the checkDuplicateRelationship doesn't consider it to be a duplicate.
Same as above but with a start date on the inactive relationship.
If we remove the start date from the inactive relationship, there is no warning so after all it's possible to do what we want but with some unnecessary steps.