Thank you for the clarification! If the new Dataset does not have those columns, the Project Automation will fail as those steps cannot be executed without those columns. To get the Project Automation working, you can edit those Steps that show errors to select the right columns to evaluate that step. Or, you can remove those steps if they are not required anymore.
It is always a good idea to work with the latest version of the Dataset. You can get the Project to use the latest version by clicking on the "Refresh Datasets" button at the bottom of the Step Editor.
Please let me know if you need any further help with this.
Regards,
Shyam Ayyar