Long story short, you will have to reset the waste ink counter.
Resetting the waste ink counter:
# Unplug all power and USB cables
# Open the cartridge door
# Hold the power button, and keep holding it while plugging the printer power cable back in
# Release the power button once all lights are on.
# When the green power light turns off, press the power button quickly two times
# The green light will start blinking. Wait for it to stabilize.
# Close the cartridge door and print a test document.
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