If a same page with contents is used as a model to create new pages not really a problem.
But in the following case:
Model page -> Page1 pasted from Model page copy -> Page2 pasted from Page1 copy ... -> Pagen pasted from Page n-1 copy
In this case the URL of the contents which are in Page n can be very long

Example on customer website:
(http-8080-44;/generate/XXXXX/_contents-images/ametys-internal%253Asites/XXXXX/ametys-internal%253Acontents/midem-entete-de-page-2-2-2-2-2-2-2-4-3-2-5-8-2-2-2-2-2-2-2-3-2-2-2/_metadata/header/1/header-illustration/image_287x1072/bandeau_liberation.jpg

So as to avoid potential problem, it would be better to change naming content naming rules after Copy/Paste action