During the ZDU process, a manual stop/start of the AE process was performed manually in 2 nodes, so a switch of the PWP takes place between WPs still in the base version, before the target version is up.
This is not needed, as the wizard will take care of stopping the processes on the old version and because of this the wizard remains stuck and you cannot move forward or backward in such situation.
Automation Engine ZDU on 21.x or 24.x
Defect
Update to a fix version listed below or a newer version if available.
Fix version:
Component(s): Automation Engine
Will be fixed in Automation.Engine 21.0.14 - Planned release April 2025
Will be fixed in Automation.Engine 24.4.0 - Planned release end March 2025
Defect ID: DE154586
Defect Public Description: A problem has been solved in the ZDU process where the PWP was terminated from the BASE version before switching to the new one (upgrade step), causing the web wizard to jump directly to the upgrade step.
Defect Resolution: Fixed with S371863: Improve the PWP switch and the distribution of ZDU flags