CUPS DeviceURI is being changed automatically for network print queues in RHEL 7.6

Issue

• The DeviceURI for print queues is being changed automatically for network print queues. When first installed, the lpoptions command returns:

  # lpoptions -p pr12 | egrep -o 'device-uri=[^ ]+'
  device-uri=socket://10.1.2.3:9100
  

  after a few days, the device-uri option changes:

  # lpoptions -p pr12 | egrep -o 'device-uri=[^ ]+'
  device-uri=ipp://10.4.5.6/printers/pr12
  

• The deviceurl is getting changed from socket:// to ipp://:

  # lpstat -v | head -n 5
  device for BW4-P001: ipp://10.12.1.7:631/printers/BW4-P001
  device for BW4-P002: ipp://10.12.1.7:631/printers/BW4-P002
  device for BW4-P003: ipp://10.12.1.7:631/printers/BW4-P003
  device for BW4-P004: ipp://10.12.1.7:631/printers/BW4-P004
  device for GL4-P001: ipp://10.12.1.7:631/printers/GL4-P001
  device for GL4-P002: ipp://10.12.1.7:631/printers/GL4-P002