Microsoft Project and Planner AMA

Needed Feedback to Project Issue: We have an issue within a Cloud Flow regarding Project. We want to set Task Start dates for Project Task with the Scheduling Engine. We integrate the logic as recommend by Microsoft with Unbound Actions and Delays.  The issue is that we got the Error "You cannot directly do 'Update' operation to 'msdyn_project'. Try editing it through the Resource editing UI via Project." but we don't do an Upgrade directly. We have multiple Support Calls without any solving and need fast support regarding this issue in an PROD App of our client.