diff --git a/system/src/Models/PlayerOnline.php b/system/src/Models/PlayerOnline.php
index e81b591e..6405d9c4 100644
--- a/system/src/Models/PlayerOnline.php
+++ b/system/src/Models/PlayerOnline.php
@@ -9,6 +9,10 @@ class PlayerOnline extends Model {
 
 	public $timestamps = false;
 
+	protected $fillable = [
+		'player_id',
+	];
+
 	public function player()
 	{
 		return $this->belongsTo(Player::class);