you should be fine over the weekend. JV3 right?
set a nozzle wash and power-down the printer, flipping the secondary switch in the back as well.
keeps the printheads/lines/dampers "wet" for as long as you need.
was it really the wrong ink? I've been having this issue lately, as well. Solved by lighting pressing the cartridge in "further". Ink level sensor or computer chip reader error, who knows, but I tap the cartridge a little harder in the slot and I get the "beep" and the "CARTRDGE K" error message changes back to "LOCAL" and I win.