A reference document appears in both the team folder and your project folder. Before deleting one as a duplicate, check whether it is a shortcut. Two entries in Drive do not necessarily mean two independent files.
Follow the link to the original
A shortcut points to another file or folder. Opening it takes you to that item, so editing the document still changes the original. Look for the shortcut indicator and inspect the item before reorganizing a shared folder.
Imagine that several projects use the same packing checklist. A shortcut lets each project find the maintained checklist. A separate copy would be useful for a project-specific version, but that copy could drift away from later corrections to the shared original. Name independent copies accordingly.
A visible title does not guarantee access
People who can see a folder can see the shortcut's title, but they do not automatically receive permission to open its target. If a colleague gets an access request, check the original's sharing settings. Creating more shortcuts will not resolve that permission issue. Consider the title too before placing a shortcut in a widely shared folder.
Removing a shortcut, where you have permission, removes that link rather than the original. Conversely, a shortcut can stop working if the original is trashed or deleted, or your access is removed. If you need a backup or an independent working copy, plan that separately. Counting visible shortcuts tells you nothing about how many recoverable copies you have.