Moved from the Creative Cloud to the Premiere Pro forum. They will be able to help you here.
Welcome to the forum.
Along with Jim's link, with you GoPro Clip Imported and in the Project Panel, just drag that to the New Icon, to create a Sequence, that matches the footage. You should not get that error message, as the Sequence will match the Clip.
I think that Joe's image is from CS 5.5, but the New Icon will work the same in CS 6.
Wow thank you so much. The tutorials are great but, it is funny what you can miss.