There is a column (Co_Id) in an item list that states that it is used in an replace item list action.
However the Action is not using this column.
See the pictures in the attachments.
For more information, as far as i know the replace item list used an action template in the template settings.
The Template was changed so that it does not include the "Co_Id" column anymore. The actions that used the form template also reflect the change when opening the configuration, yet the column still states that is being used there.
Interestingly the Column is not directly used by the Action Template only in the action that used it as template.