EF Core The instance of entity type cannot be tracked

记录一下EF core遇到：

Exception Message: The instance of entity type 'Entity' cannot be 
 tracked because another instance with the same key value for {'PropertyId'} is already being tracked.

EF单次的请求里，SaveChange不会释放entity的track

原代码：

context.PropertyEntity.UpdateRange(needUpdatedEntities);

修改为：

foreach(var updateProperty in needUpdatedProperties)
{
     var updateEntity = await context.DealerCustomerProperty.FirstOrDefaultAsync(a => a.PropertyId == updateProperty.PropertyId);

     if (updateEntity == null)
     {
          throw new ApplicationCoreException(ExceptionModule.Customer, ExceptionType.RecordNotExisted, ExceptionLevel.Error, ExceptionLayer.Repository);
     }
     _mapper.Map(updateProperty, updateEntity);
}