Error 'This record was modified by Your-Own-User during your edit session' after using Sales Path in Lightning Experience

Collision detection errors are designed to prevent undesired overrides in the data on your records. This prevention mechanism exists both in the classic Aloha interface and in Lightning Experience, however, there's a chance that you may trigger that mechanism with your own user in LEX due to the existence of Sales Path.

Sales Path is a feature that uses a Page Layout that is independent from the Record Detail's Page Layout. Due to this, collision detection errors may occur if you modify the record twice, in two different ways. For example: If you change the Opportunity Stage using the Sales Path and then, in the same page you use Inline Editing to change some other values, like the Amount, the "This record was modified by..." yourself error message will appear. 

How to Avoid This Error

• Use Sales Path only when you need to change the Opportunity Stage or Lead Status.
• Use Inline Editing when you need to update multiple fields (such as Stage and Amount) in one action.
• Avoid using both Sales Path and Inline Editing on the same page during the same session.

If you have already seen the error, make a note of the data you modified, reload the record, and re-enter your changes.

Read More:

• Why do I receive an error message when editing a record stating that another user was editing the same record at the same time?
• Known issue
• Idea Exchange