stop user from overwriting a workbook

Is there any way to stop a user from accidentally saving an Excel workbook with the same name as my file and thereby overwriting my file?

This user must have access to my workbook, which she uses every day to do her job.


Each day she runs an export and saves it as “Workbook 1”.
Then she opens my workbook “Workbook 2” which contains an enormous amount of code, opening & closing other workbooks, printing out various forms, then closing itself and all others.
Well, she accidentally saved her export as “Workbook 2” instead of “Workbook 1” and overwrote my workbook!