Audio track in Premiere Pro

Hi! I have problem with Premiere Pro, that I have created so-called two tabs (sequences) for the same video in the same project, but the audio track cannot be changed in the second tab, it is already in the video itself. I'm editing a music video, so it would be important to separate the audio track from the video files.

I have added pictures from Tab 1 and Tab2 in the attachments. In Tab 2 there are no audio options. 

Do you have any solution for this?