EF Corexxxxnstance with the same key value for {'Id'} is already being tracked.

AsNoTracki或者全局禁用

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
// 关闭EF Core默认追踪
optionsBuilder.UseQueryTrackingBehavior(QueryTrackingBehavior.NoTracking);

optionsBuilder.EnableDetailedErrors();
}