mysql - larval ORM 模型使用find方法无法准确的查找到对应的数据

mysql 数据表主键Order_ID为bigint(20),使用Order模型查找对应的订单却找到了其他的订单。
比如：Order:find(20170214006401)，却查找到Order_ID为20161009000577的订单.
调用代码如下：
$rsOrder = Order::find(20170214006401)->first()->toArray();
?>

Order模型如下
use IlluminateDatabaseEloquentSoftDeletes;

class Order extends IlluminateDatabaseEloquentModel {

use SoftDeletes;
protected $dates = ['deleted_at'];
//protected $fillable = ['Order_Status'];
protected  $fillable = array('Order_Status','Is_withdraw','Withdraw_Time');
protected $primaryKey = "Order_ID";
protected $table = "user_order";
public $timestamps = false;

// 多where
public function scopeMultiwhere($query, $arr) {
    if (!is_array($arr)) {
        return $query;
    }

    foreach ($arr as $key => $value) {
        $query = $query->where($key, $value);
    }
    return $query;
}

//无需日期转换

public function getDates() {
    return array();
}

/**
 * 指定时间内的订单
 * @param  $Users_ID 店铺唯一标识
 * @param  $Begin_Time 开始时间
 * @param  $End_Time 结束时间
 * @return array 订单列表
 */
public function ordersBetween($Users_ID, $Begin_Time, $End_Time, $Order_Status) {
    $builder = $this::where('Users_ID', $Users_ID);

    if ($Order_Status != 'all') {
        $builder = $builder->where('Order_Status', $Order_Status);
    }
    
    $builder->whereBetween('Order_CreateTime', [$Begin_Time, $End_Time])
        ->orderBy('Order_CreateTime', 'desc');

    return $builder;
}

}