今天遇到的很恼火的问题identifier of an instance of jp.co.gecj.ito.model.TIipitomanage was altered from 2 to 1

从上午到下午一直在解决这个问题，具体原因查Google有很多方法却都不适合，大概的意思是前后的类型不配合，现在引用的从 国外的论坛中发现的大概原因

 I just resolved this problem, the issue was that I had the wrong data type for my primary key in the entity's .hbm.xml file.

The underlying database table (SQL Server) has a primary key column of bigint. This column is also an identity field.

My original mapping config looked like this:

<id name="recordId" type="int" column="record_id" unsaved-value="0"> <generator class="identity" /></id>

with this configuration I received the exception
identifier of an instance of ...[class name]... was altered from 1670012 to 1670012

I modified the mapping config to be:

<id name="recordId" type="long" column="record_id" unsaved-value="0"> <generator class="identity" /></id>

and it works now.