Convert single node to Clustered Nodes

Elastic Stack Elasticsearch
5

Sorry if Im not clear. I already tried above link. I followed below

  1. Three nodes were running individually as default clustered nodes
  2. First node yml file updated. Data directory was not deleted here as I need the data inside this node. At this time other two nodes were running as single nodes cluster
  3. Second node yml will be updated. Deleted data directory. Started second node.
    Third node still running in default mode
  4. Third node yml updated. Deleted data directory. Started third node.

I asked similar question earlier in a different context Elasticsearch 3 nodes cluster not joining with each other - #16 by RAM_NATHAN

I got an answer that to avoid multiple clusters, we need to wipe the date in all three nodes , do a snapshot and restore.

Now my question is in 7.10.2, can I create a cluster without deleting my first node data?