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You can uninstall the 2nd polling engine without any consequences. The polling engines are in a table in the database called 'Engines'. The nodes are in a table called 'nodes'. Each node has an assigned polling engine ID which is assigned in a column in the 'nodes' table of the Orion SQL database. To make sure you have minimal disruption, stop the SolarWinds services on both machines > use the Monitor Polling Engines utility to associate the nodes that were on the 2nd polling engine to the primary polling engine > when you close the Monitor Polling Engines utility, confirm that you want to remove the 2nd polling engine now that it has no nodes associated > and start the Orion services back up on the primary polling engine.
This should get you back up and running again with the 2nd polling engine removed from the equation.
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