Your location in this Universe isn’t just described by spatial coordinates (where), but also by a time coordinate (when).
Ask Ethan: Why must time be a dimension?
Ethan Siegel

This is why I think time travel can’t/doesn’t exist at the moment.

There is no, public, record of any object’s spatial and temporal coordinates. If I wanted to travel back to the exact seated position I’m in now but 5 years ago, there’s no record of where I’m sat relative to anything else in the universe. I could go back in time to the same position I’m in, but find Earth is several thousand miles away, and the galaxy is in a different position … I would be cold.

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