sqlalchemy.exc.OperationalError: (OperationalError) (1067, "Invalid default value for 'timestamp'") "\nCREATE TABLE instance_status_history (\n\tserver VARCHAR(100) DEFAULT '' NOT NULL, \n\ttimestamp TIMESTAMP DEFAULT '0000-00-00 00:00:00', \n\tstatus VARCHAR(32) DEFAULT '' NOT NULL, \n\tPRIMARY KEY (server, timestamp)\n)\n\n" ()sqlalchemy.exc.OperationalError: (OperationalEr