Typically you can just delete your projects “\build” folder.
Other methods
CMake has a cache which will have wrong paths after you move or rename a project.
To clear it in Visual Studio Code:
Settings icon > Command Pallet > Enter “CMake:Delete Cache”
Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.