1. Open your process in K2 Designer or K2 Studio, depending on what you used to create and edit your workflow.
2. For each of the SmartForms client event, select and open the wizard
3. Walk through the wizard again, and when there is a page where you need to specify the form, remove the form from the field, and re-add it back
4. Save and re-deploy your workflow
After you have performed the above, try creating the package again.