When creating lookups in Dynamics 365 a fieldmapping is automatically created.
While this is a great Feature for the first relationship between two entities it is problematic when there are multiple relationships between two entities.

Eg. I have a custom Entity called "Real estate" containing locations our company delivers products to.
The building might be owned by a Company but leased by a different one (that is very often the case).
This would mean that I have two relationships between "Real estate" and "Account".
If I now create an new "Real estate" via the related grid on account both lookups will automatically be filled with the same account. If the user does not pay attention (and delete the account from the "Leased by" field) the data in our system gets compromised.

It should either be possible to
- surpress the automatic creation of mappings
OR
- delete the automatically created mapping