Based on the message displayed in the screenshot of the Epson driver window you do not have sufficient ink in the matte black cartridge to complete the ink change. Changing black inks requires flushing the black ink line that both matte and photo black share. you will have to install a new matte black cartridge to flush the line. You can then swap it out with the depleted old one and continue to use it until it runs out of ink.
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