Big Problem Dynamic urls...!

[hiteshredekar]

hey guys i need ur expertise help...!
i have a website designed by experts and they made a costumized panel which just needs to enter details and a new page with new url gets created.....!
so i had created a page for 1 of the brands... and then i indexed it.... now d problem is i went to edit the brand name and saved it and a new page got created wid new url....!
The problem here is all the contents of the page are same as the previous....! so if i indexed this page both pages wid same content only diff url will that effect my serp rankings???

[SEO_AM]

Duplicate pages = negative Google response.