Liquibase 2.0.4: how come the autoIncrement keeps getting dropped?

We have been having this ongoing problem for a while. We are using the liquibase-hiberate module and mysql.


We keep on having the autoIncrement attribute not appearing in changesets. Specifically,


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  2.                
  3.            
  4. ...


Should be:

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  2.                
  3.            
  4. ...

How do we fix this?