Updating a Collection via Specs Overwrites Manual Changes

I imported an existing OpenAPI spec into the Specs tab in Postman and used it to generate a collection.
After that, I manually updated several endpoints in the generated collection (e.g. added example requests).

Later, I updated the OpenAPI spec and used the Update button in the Specs tab to refresh the collection.
To my surprise, all my manual changes were overwritten during the update.

Is this expected behavior?
Is there a way to update a collection from a spec without losing manual modifications?
Or is the intended workflow to treat the spec as the single source of truth and avoid editing the generated collection?

Hi @navigation-observe22 ,
if you use the Update button after importing OpenAI then all manual changes will be lost. Spec will be the single source of truth. if you want you can clone and then apply your edits to keep both collections (spec and manual) or if there are no changes to OpenAI spec then do the final edits manually after the import.