Remove multiple 'ThisWorkbook' modules from Excel VBA editor

Within the VBA editor, I have found duplicate instances of the 'ThisWorkbook' module seen in this screenshot:

I would like to delete these extra instances, but do not know how.

ThisWorkbook1 is now the system recognized module with all my Sheet numbers now having a 1 appended to the end of them I.e. Sheet11, 21, 31, 41, 51, 61. I have no idea how the other modules came into existence. Can anyone assist?

Solution 1:

An excel-vba Project is hosted in a Workbook... seeing two Workbook objects under a single project is very worrying (and looking at the icons the VBE is using for the "ghost worksheets", it seems there's even more workbook objects than that) - I'd suggest you export all modules and copy the sane worksheet/workbook code into a new file (I wouldn't even try to open the ghost copies), and destroy that one.

Your project is most likely corrupted in some way.