I am getting the following error messages when syncing a TDS 5.5 project:
Item template with path ... already exists
Found duplicate id ... for item ... and ... in project. Please remove one of these items from your project before attempting to sync with Sitecore.
This error happens for many items, and there are definitely no duplicates—neither in the project file, nor on disk.
This might have begun after I updated TDS to a newer version.
How do I fix these errors?