Comment 4 for bug 422930

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Till Kamppeter (till-kamppeter) wrote :

The re-detection of the printer and creation of a new queue can be caused by the problems of the printer discovery of the new libusb-based USB backend of CUPS (bug #420015). The fact that your old queue stopped working can be caused by bug #420797.

Please do a full system update, then delete the second queue and re-plug your printer. Now no new print queue should appear.