disable sqlalchemy flask event system integration

uffd/default_config.cfg

@@ -21,6 +21,8 @@ MAIL_PASSWORD='*****'
 MAIL_USE_STARTTLS=True
 MAIL_FROM_ADDRESS='foo@bar.com'
 
+SQLALCHEMY_TRACK_MODIFICATIONS=False
+
 # do NOT set in production
 
 #TEMPLATES_AUTO_RELOAD=True