Use YaST > Software > Software Repositories. Then select the entry that has hd:///?device=/dev/disk/… in it. Uncheck the box Enables (below) and click OK.
It is your installation DVD that is still in the list, but not in your system.
If I say anything here that you already know, do not be offended. The information is also meant for any completely fresh newcomers who may know less than you.
From your menu, launch Yast (it will ask for your root password).
In there, select this (the green highlighted module in this graphic):
When you have done that, it will take a few moments to refresh and load the repositories. You will then see this screen. In here, select the check marks as follows, make certain all other repositories do not have check marks, at least for now: