Dependency Error

using System.Collections;
using System.Collections.Generic;
using Unity.Collections;
using Unity.Entities;
using UnityEngine;

public class GlobalArray
{
    public static NativeArray<int> Array;
}

[AlwaysUpdateSystem]
public class SystemA : SystemBase
{
    protected override void OnCreate()
    {
        base.OnCreate();
        GlobalArray.Array = new NativeArray<int>(3, Allocator.Persistent);
    }

    protected override void OnDestroy()
    {
        base.OnDestroy();
        GlobalArray.Array.Dispose();
    }

    protected override void OnUpdate()
    {
        var arr = GlobalArray.Array;
        Job.WithCode(() =>
        {
            for (int i = 0; i < arr.Length; ++i)
                arr[i] = i;
        }).Schedule();
    }
}

public class SystemB : SystemBase
{
    protected override void OnUpdate()
    {
        var arr = GlobalArray.Array;

        Job
            .WithoutBurst()
            .WithCode(() =>
        {
            for (int i = 0; i < arr.Length; ++i)
                Debug.Log($"{arr[i]}");
        }).Schedule();
    }
}