Suggested by Jacek Chodera Accepted 

This is a follow up on AMC-00269-S5L8F9

We realized that the AMC IA Configuration Manager allows to create inconsistencies when adding new agents.
In particular - it allows to assign many agents to the same extension. As a result we have had in the past many incidents related to the inconsistent setup.

The AMC IA Config Manager should not allow to create an agent and assign it to an already existing extension.
-> It is a kind request to provide a fix to this big.

Kind regards,