"15758389","2013-07-16 08:22:26","Debug","General","15","GeneralDebugMessage","ProcessInstance.HandleException","15 ServerEvent: Server was unable to process request. ---> Error setting metadata fields - Fields do not match.Column 'Previous Workflow Co' does not exist. It may have been deleted by another user.

The correct name of the column is 'Previous Workflow Comments". But K2 is stopping after 20 characters.

I created a new column named: Really Long Column Name and received the same error:

"15766776","2013-07-16 09:08:41","Debug","General","15","GeneralDebugMessage","ProcessInstance.HandleException","15 ServerEvent: Server was unable to process request. ---> Error setting metadata fields - Fields do not match.Column 'Really Long Column_x' does not exist. It may have been deleted by another user.