Why do multiple versions of the file open when I open an Excel file for edit on desktop?

Issue
When I open an Excel file for edit via desktop, multiple versions of the file are opened.

The Activity section in the FYI drawer also shows numerous start and finish date/times.

Cause
This occurs if the workbook was saved when multiple windows were open for that workbook.

Solution
This is a function of Excel.

The following Microsoft article provides more information and steps on how to help solve the issue:
When you open a workbook, Excel may display multiple windows that contain a copy of that same workbook