Teleportation won't work, it says this location doesn't exist, even though I've been there

When I teleport when I set a spawn point, it worked. But when I added a spawn point to the Nether, I wasn't able to teleport to that old spawn point, even though it was still in the over world, and still existed in the game. When I typed in the coordinates, -1771, 62, -1018, it said "No entity was found."