Duplicate settings in Pref File

what kind of info or screens do you han need ?

Can you try to figure out in which case  duplicate entries are added to the pref file? Does it happen when you make changes to the setttings or just running a job? Or does is seem to happen more like random?

I tried to reproduce this, but didn't get those duplicate entries.

I have exactly the same problem but I don't know what causes it. It seems random. So you say that the error causes double entries and not vice versa? I thought it is the opposite: because of the double entries, linuxcnc returns the error. I am confused.

I am also facing the same issue. It seems to me that the duplication of entries in .pref file is happening after the completion of a job, and shutting down the software/ system. It is also very random. Sometimes it happens, sometimes it doesn't.
I clearly remember that this error started occurring only after I changed the theme in the settings tab.

Are you using any embedded programs?
If you erase the entry does it come back?
You must only hand edit preferences when Gmoccapy is not running.

The ones with a capital letter on the end word are from Gmoccapy:

system_name_G54 = G54

It seems the system entries preferences are checked at initialization and when the offsets tab is closed.

No. Not using any embedded programs.
Yes. After erasing the duplicate entry, it comes back only after shutting down Linuxcnc.
I am editing the preference file only when Gmoccapy isn't running.
And the occurrence of this is very very random. At times, the duplication doesn't happen.