EF Core DeleteBehavior.Cascade可能会导致循环或多个级联路径

我有以下实体（为简洁起见，以下简称）；

public class Trader : AuditableEntity
{
    public int? UserId { get; set; }
    public ApplicationUser User { get; set; }

    public int? AccountManagerId { get; set; }
    public ApplicationUser AccountManager { get; set; }

    public List<TraderContactHistory> ContactHistory { get; set; }
}

public class ApplicationUser : IdentityUser<int>, IEntity
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public int Level { get; set; }

    public DateTime JoinDate { get; set; }
    public DateTime? LastLogin { get; set; }

    public ApplicationUserImage ProfileImage { get; set; }
}

为了完整起见，TraderContactHistory如下：

public class TraderContactHistory : Entity
{
    public Trader Trader { get; set; }
    public DateTime ContactDate { get; set; }
    public ApplicationUser ContactedBy { get; set; }
    public bool RequestedCallbackLater { get; set; }
    public string Notes { get; set; }
}

现在添加约束后；

public override void Configure(EntityTypeBuilder<Trader> entity)
{
    entity.HasOne(x => x.User)
        .WithOne()
        .HasForeignKey<Trader>(x => x.UserId)
        .OnDelete(DeleteBehavior.Restrict);
}

以下内容（因为我们现在需要删除交易者时清除相关用户）；

public override void Configure(EntityTypeBuilder<Trader> entity)
{
    entity.HasOne(x => x.User)
        .WithOne()
        .HasForeignKey<Trader>(x => x.UserId)
        .OnDelete(DeleteBehavior.Cascade);

    entity.HasOne(x => x.AccountManager)
        .WithMany()
        .HasForeignKey(x => x.AccountManagerId)
        .OnDelete(DeleteBehavior.SetNull);
}

为了完整起见，TraderContactHistory配置是；

    public override void Configure(EntityTypeBuilder<TraderContactHistory> entity)
    {
        entity.HasKey(x => x.Id);

        entity.HasOne(x => x.Trader)
            .WithMany(x => x.ContactHistory)
            .OnDelete(DeleteBehavior.Restrict);

        entity.HasOne(x => x.ContactedBy)
            .WithMany()
            .OnDelete(DeleteBehavior.Restrict);

    }

产生以下迁移；

    protected override void Up(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.DropForeignKey(
            name: "FK_Traders_AspNetUsers_UserId",
            schema: "Bemfeito",
            table: "Traders");

        migrationBuilder.AddForeignKey(
            name: "FK_Traders_AspNetUsers_UserId",
            schema: "Bemfeito",
            table: "Traders",
            column: "UserId",
            principalSchema: "Bemfeito",
            principalTable: "AspNetUsers",
            principalColumn: "Id",
            onDelete: ReferentialAction.Cascade);
    }

运行时导致以下错误update-database（我正在运行MSSQL数据库）；

System.Data.SqlClient.SqlException（0x80131904）：在表“ Traders”上引入FOREIGN KEY约束“ FK_Traders_AspNetUsers_UserId”可能会导致循环或多个级联路径。指定ON DELETE NO ACTION或ON UPDATE NO ACTION，或修改其他FOREIGN KEY约束。

谁能看到为什么会这样吗？可能是与的TraderContactHistory链接Trader无声地造成了这种情况吗？由于我目前没有配置设置？