An easy way out is to just pull the drain lines off the cap tops. Pull both off and then let the printer pump the pump for a couple min. and follow the panel info. As long as the drain lines are off the captops there will be no waste of ink and no need to swap carts or replace carts etc. and the printer will think it has done it. Once all is done put the lines back onto the captops.
As far as I know there was no other way to stop the printer from wanting to finish the pump up. Even turning it off and unplugging did not help.