Board Thread:General Discussion/@comment-34887612-20180708233812/@comment-35284508-20180709054005

Basically MT only endorses/supports one id per device and never reuses ids so any serious crash and reinstall of the game on the same or different device creates a new id and the player often wants thier chosen name, avatar, game status and friends ported over. This creates a sleeper or 'zombie" because the old id is not dropped. In my case i had a tablet with a growing list of problems and a cracked screen that created dead areas. I bought a new tablet, had MT port things over and continued on. But i still have the ailing device ad an id i could still play. I have changed the name and avatar on it just in case it gets started up again. Any of my friends who did not specifically drop the old id would see it come back from zombie status under the new name and may question where this -friend- came from.

In short, various problems can split a friend in two and trying to play the same game on multiple machines will create splitting problems.