My printer adds a blue background [closed]

I'm running Ubuntu 18.04LTS. I have an HP Photosmart C7280 color printer. The printer is attached over the local network. This has worked nicely for me for a long time.

But today, suddenly, everything I print gets a solid blue background. I can still read the text, but the entire page background is blue. Other computers can print to the same printer without problems; the blue background is only added on one computer.

I've tried restarting both the computer and the printer. I've removed the printer from my Linux configuration and added it again. The result is always the same. Even the print test page feature of the printer installation program adds a blue background.

What can I do?

EDIT

The problem seems to be caused by an update to ghostscript. My ghostscript 9.26 was updated today. I tried another Linux system with an older version of ghostscript 9.26, and it worked nicely. I then updated ghostscript on that system, and then I got a blue background.

How do I force the system back to the older (working) version of ghostscript?

EDIT2

This is definitely a bug. It has been reported by others in the Ubuntu bug tracker: https://bugs.launchpad.net/ubuntu/+source/ghostscript/+bug/1817308

Installing an older version of ghostscript restores the ability to print properly.

I run this command:

sudo apt install ghostscript=9.18~dfsg~0-0ubuntu2 \
libgs9=9.18~dfsg~0-0ubuntu2 \
libgs9-common=9.18~dfsg~0-0ubuntu2

and now my Ubuntu 16.04 prints properly.

In order to stop the update happening again, I run this command:

sudo apt-mark hold ghostscript=9.18~dfsg-0-0ubuntu2

Reference: Bug #1817308 “GhostScript Update causes Blue Background”