Hi @Paula Alejandra,
Flow designer indeed is a fascinating topic!
Let's start by understanding Subflow.
- Subflows are a sequence of reusable actions to use in a flow.
- A good programmer writes code in functions not only to reuse but also for unit testing. The same principle can and should be applied while creating Flows. Creating a subflow allows you to easily test smaller components of your overall flow, with the added bonus of being able to reuse it in other flows.
- The only real difference between a Flow and a Subflow is that Flow has a trigger. So think of the Flow as being the trigger, and your actions just being one or more Subflow.
Now coming back to your question, because of the subflow's reusable functionality, it is always a best practice to not edit or deactivate a subflow as you never know in how many flows it is getting leveraged.
But still, if you want to edit the existing subflow, creating a copy of the original one and then editing it would be my suggestion.
For further information on best practices related to flow designer, check out the below article.
https://www.servicenow.com/community/workflow-automation-articles/flow-designer-best-practices-gener...
You can also go through the ServiceNow product doc about subflows.
https://docs.servicenow.com/bundle/rome-servicenow-platform/page/administer/flow-designer/concept/su...
If you feel that I have assisted you in any manner, please mark my comment as helpful/correct.
Thanks,
Shreya
