last shot entity がバグってる

on leftclick holding bow:
  set {_x} to x-coordinate of player
  set {_y} to y-coordinate of player + 1.6
  set {_z} to z-coordinate of player
  set {_world} to world of player
  set {_yaw} to player's yaw
  set {_pitch} to player's pitch
  shoot arrow from player and location({_x}, {_y}, {_z}, {_world}, {_yaw}, {_pitch}) at speed 2.8
  set {arrow::%last shot entity's uuid%} to 300

on damage:
  attacker is player
  victim is not player
  projectile is set
  
  set damage to {arrow::%projectile's uuid%}