Hi @Team,
How to retain/migrate running process instances in current version of the process into new version of the same process?
Example ::
Process A → version 0.1 → Running with 2 process instances
Now I want to deploy Process A → version 0.2 with updated flow
Here I need to retain/merge version 0.1’s 2 process instances into version 0.2 and undeploy version 0.1.
Please help/share your suggestions on this.
Hello @Parthasarathi_Muthai,
you can migrate your running process instances using e.g. the Camunda REST API.
The documentation explains all possibilities to migrate your instances quite well.
To remove a specific version of a process definition, you could also use the REST API, especially the one to delete a process definition.
I hope it helps 
Luc
Thanks @lwluc . Is there any UI tool to visualise process merge plan?
I do not know of any open source tool that could visualize your existing migration plans. But you could migrate your process instance via the Camunda Cockpit as well (Process Instance Migration | docs.camunda.org). Keep in mind, this is an enterprise feature only.
Happy to help you
Luc
Thanks @lwluc