How to move Level Sequence back to Zero / 0 after Timecode moves it?

I’m not doing a game but am doing a simple 3d animation. While exploring ‘Take Recorder’ I recorded a track into my existing Level Sequence. Everything was moved to the time code of 3123994. How can I get everything back so it starts at zero on the timeline? I have a lot of tracks and dragging one at a time is very time consuming. There must be an easy way.

For new takes, you can untick “Start at current timecode” from the settings page.