Disabling the polling might not take effect for a little while as AMP gets the last few polls out of its system. Try deleting a duplicate device after a few hours and see if it still comes back.
Can you share a few details about the data in particular? AMP tries hard to avoid discovering duplicate devices, so I'm curious to see how it is failing. Please supply the following if you can:
- Name of original switch in AMP
- Domain of original switch in AMP (if AMP has the domain - visible on the Manage page)
- Name of the CDP neighbor that results in the duplicate
Has AMP fetched the IP address information for the original switches interfaces? It will only be able to fetch the IPs if it has the switche's CLI credentials.
AMP tries to detect duplicates using the name and IP address, so I'm guessing the name doesn't match up for some reason, and your AMP does not have CLI credentials for the switch so it isn't able to fetch the management interface's IP and detect the duplicate that way either.