Can't Save or edit entity with Symfony 2 app after dropping table column in database
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I have a Symfony 2 front end to a mySQL database.  I changed my database by dropping a column on one of my tables.  Within the app I have done the following to reflect this change:

 - removed the field from the form class
 -  removed the field, getter & setter and annotations from the entity class
 - removed the field from the templates

All the pages display correctly, but when I submit after editing or creating a new record, I get the following error:

 SQLSTATE[42S22]: Column not found: 1054 Unknown column 'trial_abbrev' in 'NEW'
500 Internal Server Error - PDOException 

I guess I must have missed something, but I suspect it is in the depths of the Doctrine magic stuff that happens automatically.  

Any suggestions much appreciated.