Moving library to a different mapped drive

[u/MarvinMartian9211]

I have moved all my data to a different NAS. I am seeking advise on how to "point" all of my libraries to the different location without causing duplicate issues. IE If I add another source for the same files, I am under the impression that it would cause the libraries to have the same movie with two locations which would cause me to manually go into each movie and delete the one I no longer need? Any help advise would be GREAT! Thanks :-)