As shown below, any process design changes can be pushed to the sleeping process instance(s). 

On the Process Instances page, select the process from the table and click the Utils> Update> Design menu option.

A pop-up window is displayed for confirmation. The application collates all design changes to push to the sleeping process instance (related to the definition). 

You may select “All, Changed, or None” options. Click the OK button to proceed. 

The design changes are updated successfully with a confirmation. 

Note: The values passed to variables or globals to a process instance through the API are retained by default, regardless of whether the values are correct.