Today during my work on one of the Intermediate projects I somehow,
unintentionally filled in the same URL for the Project that has not been implemented yet.
The erroneously marked as ready project was saved and I was not able to reset its
link to the CodePen site.
I tried to pass an empty string but this did not help.
How can I reset a link to CodePen for a Project that is not ready (fix this error)?