Need Time Entry Rule for Overlapping Time on timecard

Summary: Need Time Entry Rule for Overlapping Time on timecard

Content (required): Need Time Entry Rule for Overlapping Time on timecard. Not sure which fast formula to do this with. We are using the Web Clock for time entry but also the Current Timecard view to edit or correct time when needed. If someone accidentally adds time manually on both that overlaps, we want a notification or message to go out to the employee or manager to fix before submitting their time.

Version (include the version you are using, if applicable): 23B

Code Snippet (add any code snippets that support your topic, if applicable):