How long do I need to keep registering new devices due to hardware ID changes?

[Nakyoung]

I have been using PyArmor sometimes for the past 2-3 years.
My environment is Ubuntu, and it's not a virtual environment.

Since I use it infrequently, I'm not sure exactly what causes this situation, but recently I had to register my device again under the group license in less than about 2 weeks.
Could using a VPN or conda envirnment or upgrading the Ubuntu version be the reason for the device ID changes?

I understand that the group license supports up to 100 devices, and I am currently using 4, so I'm not worried for the time being. However, I'm wondering why this keeps happening. Also, I'm curious about what happens if I end up using all 100 device slots.

Additionally, while searching for issues, it seems that attaching hdinfo is often necessary for diagnosing the cause, so I have added it below:

 (pyarmor)  ~/playground/pyarmor  python -m pyarmor.cli.hdinfo
Machine ID: 'm458cf41634226d6c1900b89af71ace0c'
Default Harddisk Serial Number: Permission denied
Default Mac address: '00:d8:61:bc:7c:17'
Default IPv4 address: '192.168.31.21'
Multiple Mac addresses: <7a:f7:81:52:f3:8b,02:42:d9:b9:8a:d0,00:d8:61:bc:7c:17,52:54:00:b2:c6:96,02:42:ba:f9:9f:c3,02:42:38:04:ee:88,76:7b:a4:65:cb:65,aa:0b:14:f7:a4:62,02:42:6d:75:2d:7c>
Domain: '(none)'
 (pyarmor)  ~/playground/pyarmor  ls /sys/class/net
br-232952f7269b  docker0  lxdbr0  veth1ee806e  veth5870cf4  veth8a6d9d2  vethcab83d3  vethed77554
br-4283221510f7  enp34s0  lxdbr1  veth31abe14  veth5938a97  veth999e9a5  vethdd45e2c  virbr0
br-c1e232a8c42e  lo       lxdbr2  veth33d60df  veth7b9a107  vethb194ec7  vethe862640  wg0

[jondy]

First upgrade Pyarmor to latest version, or at least Pyarmor 9.0+
Second, login ubuntu with same user. root user may get serial number of harddisk, other users may not, it results in different machine id.
For physical machine with latest Pyarmor, machine id should be same. But if using pyarmor in docker container which in the physical machine, the machine id is changed every run.
If there is still problem, please report issue.