The printer uses chipped cartridges that identifythemselves to the printer. The printer will not recognize a PG-545 Pigment Black where the CL-546 Dye-based Color cartridge should be.
You could refill the CL-546 with all black ink but this may present a new issue if you put Pigment Black in the CL-546 Dye-based colored cartridge - pigment particles may clog the CL-546 print head that is built into the cartridge. You would need to turn off ink level monitoring to allow the cartridge to be used.
If you give it a try then let us know the results..