Even if you set all the debug cheat options to OFF, if the memory option is not set to "CLR", and the debug cheats have already been enabled on the cart previously, the save battery remembers that and the cheats will still be active. One way to confirm this is if your RCI meters stay at max demand and never change, this affirms that the Valve Max debug cheat option is enabled. The debug code menu will only display the memory option to "SET" when the code has been entered and enabled previously.

600K Population speedrun category does NOT allow for the debug code to be used in any form.