Thank you also for this information.
In fact, I had already addressed this topic a long time ago.
Unfortunately my home partition has become full.
The computer, an assembled desktop. it is very old, more than 10 years old, it is an AMD Phenom 9650 Quad-Core, and the system disk is also quite old, therefore small in size, a
Western Digital Raptor 150 GB, 10,000 rpm
at the time a good harddisk but now…
I have a minimal installation of Windows 10, on a 44GB partition, which is full, which I never use but which I occasionally use to help friends in difficulty with their Windows computers, a partition created a long time ago, I think with Windows 7, but which then remained, even though I use it less and less, but it still takes up space.
Then I have the two partitions for OpenSUSE, the 32Gb root and the 70Gb home, and the root partition often gives me filling problems.
I often wanted to change disk and modernize but I never thought it was worth it because it would be better to modernize the entire computer.
In fact I bought a used laptop, a Dell Precision 5520, which I should replace this one but I haven’t made up my mind yet, and I’ve had the Dell for months.
All this to say that some time ago, almost 1 year now, desperate for one of the many fillings of the root partition, I made the desperate gesture of keeping only 1 kernel version online.
One thing I don’t like, I think the minimum for safety is 2 versions, given that the secondary version is used as an emergency in case an update could create problems, and in the past this has also come in handy on other occasions, so I don’t like having only one active kernel version.
Now that you have given me your advice it has occurred to me that I would actually have difficulty even trying the kernel you recommended.
Since a long time had passed since I had configured a single active kernel today, talking to you, I no longer even remembered having this anomalous configuration, and I would have even started installing the backport kernel without remembering that I have no space.
Now honestly I’m faced with a dilemma, to test the kernel I would have to create space, but the only way is to resize the root partition, which is something that doesn’t worry me too much, I’ve done it several times on different computers, but never on this one, which is my main computer and where I do a lot of work, and which therefore I would like to never “break down”, for me it would be a problem to be without it even for just a couple of days.
Among other things, given the desperation of filling the filesystem, I had already tried resizing, obviously booting from live distributions, but it had given me problems and I had given up.
Perhaps the most logical thing would be to move all my activity to the new laptop and leave this old desktop alone, only that this one is a “complex” machine with a lot of applications installed, with a lot of configurations, with a lot of schedules, customizations, etc… switching to a different computer and recreating everything exactly the same would certainly be a job for many weeks, keeping the old one active in parallel to see what is missing or needs to be configured, a hard job that I keep putting off a bit due to lack of desire and courage to do it, but also, and above all, because changing computers would almost certainly mean a stop or slowdown of all activities, and this is not the period to do it, given that it is a period of intense work.
I don’t know if you can understand the dilemma, I guess so.
Among other things, obviously, there is Bluetooth on the laptop and OpenSUSE works perfectly, but on the desktop I would still like to make Bluetooth work with the dongle we are talking about, because then once the changeover has taken place I would sell it as used, also including the dongle. BT.
I don’t know, I’m undecided.
Maybe I’ll do something crazy, and over the weekend I’ll start making the switch to the new computer, and it’s about time, and resizing the partition to try the kernel you recommended.
Maybe I have to gather all the courage, and even the desire, and do it!! 
Life is hard.