I broke Minecraft via teleportation

I was playing Minecraft and I wanted to find an ice spike biome, so I just teleported 10000 blocks away, and I repeated to try to find it.
Unfortunately, I got frustrated beacuase I couldn't find it, and so I just teleported 3000000 blocks, came back and it said, "Connection Lost, Invalid Position".
It then exited me to the server list. I don't know why so I'm just asking why. I was in a Singleplayer world and it exited to the Server List!
FYI how do I delete a question beacuase to many people down voted this so now I can't answer
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Is there teleportation in Minecraft?
You can teleport almost anywhere in Minecraft using the "/tp" command. You'll need to enable cheats in your Minecraft world before you can teleport. Once active, you can teleport to other players, dimensions, or specific coordinates.How does teleportation work in Minecraft?
Teleporting in Minecraft on PCPress F3 + Fn + F3 on PC or Alt + Fn + F3 on Mac to display your current coordinates below the mini-map. Make a note of these coordinates as you'll need them to teleport back. When you want to teleport, open the console by pressing the / key on your keyboard.Can you teleport in survival Minecraft?
Teleporting in Minecraft is one of the easiest ways to traverse its sprawling world. Most people consider it cheating in Survival worlds \u2013 after all, teleporting requires the use of console commands \u2013 but there's no doubt it'll make your time with Minecraft a lot less tedious.I Teleported Players in Survival Minecraft
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