EF核心自动删除

Question

Connector.cs

public virtual DbSet<Scheduler> Scheduler { get; set; }
public virtual DbSet<Warn> Warn { get; set; }

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    optionsBuilder.UseLazyLoadingProxies().UseMySql("Url");
}

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Warn>(entity => {
        entity.HasKey(e => new {e.Gid, e.UserId})
              .HasName("PRIMARY");

        entity.Property(e => e.Gid)
              .HasColumnName("gid")
              .HasColumnType("bigint(20) unsigned");

        entity.Property(e => e.UserId)
              .HasColumnName("userId")
              .HasColumnType("bigint(20) unsigned");
    });

    modelBuilder.Entity<Scheduler>(entity => {
        entity.HasKey(e => e.Gid);

        entity.Property(e => e.Gid)
              .HasColumnName("gid")
              .HasColumnType("bigint(20) unsigned");

        entity.Property(e => e.UserId)
              .HasColumnName("userId")
              .HasColumnType("bigint(20) unsigned");

        entity.HasOne(d => d.Warn)
              .WithMany(p => p.Scheduler)
              .HasForeignKey(d => d.Gid)
              .HasPrincipalKey(p => p.Gid)
              .HasConstraintName("scheduler_ibfk_1");
    });
}

Test.cs

var warns = ctx.Warn;
foreach(var id in Ids) {
 ctx.DetachLocal<Warn>(_ => _.Gid == Guild.Id && _.UserId == id);
 var userWarn = await warns.SingleAsync(e => e.Gid == Guild.Id && e.UserId == id);

 ctx.Scheduler.Add(new Scheduler {
  Gid = Guild.Id, UserId = id, StartTime = DateTime.Now, EndTime = type.Time,
   IsUnlimited = !type.Time.HasValue, WarnCount = type.WarnCount,
   Handlername = Author.FullUserName()
 });
}
await ctx.SaveChangesAsync();

我将数据添加而不是删除，但是由于某些原因，旧数据被删除，新数据被添加。

该代码使用回收连接器，所以我分离了数据，这有关系吗？