Duplicate Intercompany Customer

Issue - Duplicate intercompany Customer created within system with different registry ID , Firstly when we create a Legal entity system by itself will create a Party where we can able to see the Intercompany Customer only .( Couldnt see the Intercompany Supplier ) ,Secondly when we create a Intercompany Supplier system by itself will create a Party in which we can able to see the Intercompany Customer.
How to avoid the Duplicate Intercompany Customer.

Expectation - when Party is created user should be able to see both Supplier & Customer.