Hello again,
It seems that somebody had deleted manually the constraint fk_event_subscriber_event_notification_methods from your database Therefor, the first line that attempts to drop this constraint in 03_05_0050_event_notification_methods.sql: ALTER TABLE event_subscriber DROP CONSTRAINT fk_event_subscriber_event_notification_methods; fails.
uhm, interesting. could this be caused be deinstallation of dwh reporting?
Please try to run the following manually and upgrade again
psql -U engine -c "ALTER TABLE ONLY event_subscriber ADD CONSTRAINT fk_event_subscriber_event_notification_methods FOREIGN KEY (method_id) REFERENCES event_notification_methods(method_id) ON DELETE CASCADE;" engine
it just drops "ERROR: relation "event_notification_methods" does not exist"
Let me know how it is going ...
Eli
Thank you already for your help! Juergen