Control builder library warning

Hi

I am opening a control builder project i received from a customer, it seems like there are some custom libraries being used in the project, and i get a warning when opening the project. I have the libraries in the library folder, so they are present. The following warning is shown, when i open the project:

"Two identical libraries has been found! It is not recommended to use two libraries with the same name and identifier....." Library name: , Identifier: .

Is this going to be an issue when i try to download the project to a controller?

I have checked the library folder, and i only have one instance of each library, but perhaps they copied a library, made som changes and then renamed it to something else. But the identifier is the same?

Br
vegard