(colord:1544): Cd-WARNING **: failed to get session [pid 584]: No such device or address

The entire warning is below. This happens every seven minutes. At the
time it happens the PID mentioned, in this case 584 does exist

584 root      20   0   94604   8868   6436 S   0.0  0.2   0:00.03
cupsd 

However it does change between this warning and the next.

Mar  6 11:07:18 localhost systemd[1]: Started CUPS Scheduler.
Mar  6 11:07:18 localhost colord[1544]: (colord:1544): Cd-WARNING **:
failed to get session [pid 584]: No such device or address
Mar  6 11:07:18 localhost colord[1544]: (colord:1544): Cd-WARNING **:
failed to get session [pid 584]: No such device or address

Mar  6 11:14:17 localhost systemd[1]: Started CUPS Scheduler.
Mar  6 11:14:17 localhost colord[1544]: (colord:1544): Cd-WARNING **:
failed to get session [pid 1006]: No such device or address
Mar  6 11:14:17 localhost colord[1544]: (colord:1544): Cd-WARNING **:
failed to get session [pid 1006]: No such device or address

Though realizing it's only a warning it is irritating. Anything I can
do about it?

colord:
  Installed: 1.2.12-1ubuntu1
  Candidate: 1.2.12-1ubuntu1
  Version table:

Distributor ID:	Ubuntu
Description:	Ubuntu 16.04.2 LTS
Release:	16.04
Codename:	xenial

gdm3:
  Installed: 3.20.1-1ubuntu2~ubuntu16.04.1
  Candidate: 3.20.1-1ubuntu2~ubuntu16.04.1
  Version table:
 *** 3.20.1-1ubuntu2~ubuntu16.04.1 500
        500 http://ppa.launchpad.net/gnome3-team/gnome3-staging/ubuntu
xenial/main amd64 Packages

-- 
Chris
KeyID 0xE372A7DA98E6705C
31.11972; -97.90167 (Elev. 1092 ft)
11:11:30 up 3 days, 19:39, 2 users, load average: 0.27, 0.25, 0.20
Description:	Ubuntu 16.04.2 LTS, kernel 4.4.0-65-generic

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