Copyregion not copying anything?

Hello, Im trying to save a part of terrain into a terrainregion to load it back in when i need the terrain changed. I have the terrain as shown here. with the neon sticks indicating where my region stops and starts.


im trying to save the region to a terrain region with this code:

workspace.Terrain:CopyRegion(Region3int16.new(Vector3int16.new(444,384,-316),Vector3int16.new(556,420,-204))).Parent = game.ServerStorage

However, when i paste it with this to a different location to see if it worked. nothing appears. its as if the terrain wasnt saved with copyregion. Does anyone know what im doing wrong?

workspace.Terrain:PasteRegion(game.ServerStorage.TerrainRegion,Vector3int16.new(400, 420, -200),true)