You must adjust data flows that use data fields whose data basis no longer exists, because for example, the fields assigned to the dialogs were removed.
Procedure
The business process is changed, so that you must update the executable process before you start the simulation. To do this, enable the Generate executable process option in the configuration in the Simulate governance process dialog.
If a new data field was added to the data flow, for example, an additional text field was created in the dialog, this text field is automatically added to the simulation data and included in Process Governance Simulation.