Added package from disk to a project then tried to rename it, but the original name is preserved in the project

Good day,

I added a package saved on disk to an SSIS project. I then modified it and renamed. However, the original name with (1) is still shown in the project although I can see that the newly named package is saved in the project directory. But the project still shows the package under old name and when I try to remove it it gives me this error:

Microsoft Visual Studio

The path is not of a legal form.

OK

Should I try to manually fix the project file to remove this ghost reference?

Thanks in advance.