What causes the 'Cannot add duplicate relationships' error message to appear on Relationship Editor?

[matthew_hughes]

I was just wondering if anyone knows where in ServiceNow is the below error message configured when trying to add a duplicate relationship in Relationship Editor?

The reason I ask is because I'm trying to add some more functionality and prevent other types of relationships being created in ServiceNow.

[BBijag02]

Hi @matthew_hughes :

This looks like message coming from BR. 

Can you please try opening, BRs on this parent table, where you are planning to map?

[matthew_hughes]

Hi @BBijag02 I've checked the business rules for the 'cmdb_rel_ci' table and couldn't find the message in any of them