Symptoms
Column 'Name_Value' does not exist. It may have been deleted by another user.
Diagnoses
After upgrading to the latest version of K2 you get an error within smartforms. The error is manifesting itself when you have a SMO created against a list that has a "Person or Group" field in the list. If you try to use the "Value" field from that column K2 SmartForms is throws the following error:
“Column ‘Cloumn Name_Value’ does not exist. It may have been deleted by another user. …”
Resolution
This is a known issue. A coldfix is available upon request.