You can choose to delete a single flow version or the entire flow package.
All flow versions in the flow package will be deleted when the entire flow package is deleted.
Go to the Flow Package Management page, locate the flow package you want to delete, click Delete, and delete it after confirming your deletion operation.
To delete a flow package, all flow versions in the package should be "unused".
Go to Application Management page and locate the flow package where the version you want to delete resides. Click View. The version details page of the flow package appears. Locate the version you want to delete, and click Delete to delete it.
To delete a version, the version should be "unused".