Duplicate Servers

Good morning. I recently created a virtual search engine for elastic and kibana and it worked very well. Then I cloned this server and created two more servers that work as a cluster. I now have 3 servers.
Everything I do on server 2 it replica on server 3 and also on server 1. The cluster and only server 2 and server 3. Why are they replicating on server 1?

tanks

1 - (Test server)

2 and 3 (Cluster Server)

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