Hello everyone

I'm new in the forum, but I have been reading it already couple years I think. While working on improving my old project I run on weird error. After two years of working with this file all of the worksheets and workbooks got cloned in weird way which is showed only in VBA editor. I cannot delete them, cannot view them, but they cause series of errors in all of the VBA code (including Automation Error). Obvious precautions were made, and worked up till recent days. Screenshots of the issue below (Sorry for Polish language inside of it):
Worksheet.JPG
Workbook.JPG

I cannot attache file itself because of all the fragile data that is in it. If it's needed let me know what other data I can provide.

Cheers
Adeophan