This page clarifies what happens when you edit or unpublish a workflow that is already published.
What happens when you edit a published workflow
You can edit a workflow that is published (running).
After you make your edits, you can save a draft.
Saving a draft does not interrupt the currently published workflow.
What happens when you republish an edited workflow
The republished workflow always starts clean, with:
No queued executions.
No inherited state from previous versions.
Only new records entering after republish are processed using the updated configuration.
What happens when you unpublish a workflow
When you unpublish a workflow:
All queued and scheduled timer processes immediately stop.
All pending downstream actions are discarded.
No records continue pushing into CRM, MAP, or other destination systems.
The workflow enters an inactive state with zero active or pending operations.