Hibás lekérdezés:
INSERT INTO log ( user_id, module, module_id, action, data, ip, host, date ) VALUES ( "", "Suggest", "9", "view", NULL, "54.174.43.27", "ec2-54-174-43-27.compute-1.amazonaws.com", NOW() )
Incorrect integer value: '' for column 'user_id' at row 1