Speed Checks

Hello! I am bored so I'm just doing some random things and am having a few problems, first of all, the speed check is bothering me by it saying, "Username is moving too fast!", is there a way I can disable that?
This is why:

@EventHandler
public void onPlayerMoveActoins(PlayerMoveEvent ev) {
Player player = ev.getPlayer();
player.setVelocity(player.getVelocity().setX(player.getVelocity().getX()*2));
player.setVelocity(player.getVelocity().setY(player.getVelocity().getY()*2));
player.setVelocity(player.getVelocity().setZ(player.getVelocity().getZ()*2));
}

I also tried setting players WalkSpeed though I got a error with that here:https://hastebin.com/qakuxoqemi.cs
here was the code I used for that:
@EventHandler
public void onPlayerDeathEvent(PlayerMoveEvent ev) {
Player player = ev.getPlayer();
player.setWalkSpeed(player.getWalkSpeed()*1.1f);
}