Recently we had frequent requests from clients who want to utilize the functionality of the Sitefinity Module builder, but for some reason named their items with the same names and therefore experienced problems when the item’s details needed to be presented as the URL constructed is duplicated.
In order to deal with this issue, you need to build your item’s URL based on a field or combination of fields in the module that will be unique for every item. You can find a detailed walk through on how to achieve this, as well as a working sample under the following link:
Change how URLs of dynamic items are generated