This is a sample application that implements a suggestion on the logic needed to handle concurrent updates.

Please refer to the article How To Handle Concurrent Updates on Application Data Records for more details.

To test the solution, you should:

1. Login with two different end-users (you can either use different browsers, open a new incognito browser window, or even have someone else testing in another laptop)
2. Both users should then open and edit the same record (conflict will be detected and the user will be asked to act up on it)

The sample already bootstraps one record to help you testing the functionality.