Upgrade from SSR Version 5.6.7 to SSR Version 6.1.12, coredump was generated.

[root@ t128]# coredumpctl list
TIME                            PID   UID   GID SIG PRESENT EXE
T=xxxx    22473     0     0  11 * /usr/bin/python3.6
T=xxxx     7943     0     0   6 * /usr/bin/python2.7

[roott128]# coredumpctl info 22473
           PID: 22473 (yin-and-friends)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 11 (SEGV)
     Timestamp: xxxxx
  Command Line: /usr/bin/python3.6 -S /usr/lib/128technology/par/yin-and-friends.par --log-file /var/log/128technology/yin-and-friends.log --log-level debug update stats
    Executable: /usr/bin/python3.6
 Control Group: /system.slice/128T-stats-model-watcher.service
          Unit: 128T-stats-model-watcher.service
         Slice: system.slice
       Boot ID: xxx
    Machine ID: xxx
      Hostname: xxxx
      Coredump: /var/lib/systemd/coredump/core.yin-and-friends.0.509180b71b2c4cb8ba5e513a7de0569f.22473.1751908674000000.xz
       Message: Process 22473 (yin-and-friends) of user 0 dumped core.

                Stack trace of thread 22473:
                #0  0x00007ff56a28b318 visit_decref (libpython3.6m.so.1.0)
                #1  0x00007ff56a1d9a3e dict_traverse (libpython3.6m.so.1.0)
                #2  0x00007ff56a28a829 collect (libpython3.6m.so.1.0)
                #3  0x00007ff56a28b3ba collect_with_callback (libpython3.6m.so.1.0)
                #4  0x00007ff56a2e5e56 PyGC_Collect (libpython3.6m.so.1.0)
                #5  0x00007ff56a2dd2f2 Py_FinalizeEx (libpython3.6m.so.1.0)
                #6  0x00007ff56a1895fe Py_Exit (libpython3.6m.so.1.0)
                #7  0x00007ff56a189d3c handle_system_exit (libpython3.6m.so.1.0)
                #8  0x00007ff56a18a73e PyErr_PrintEx (libpython3.6m.so.1.0)
                #9  0x00007ff56a18ed5a RunModule (libpython3.6m.so.1.0)
                #10 0x00007ff56a2e54de Py_Main (libpython3.6m.so.1.0)
                #11 0x0000000000400ab9 main (python3.6)
                #12 0x00007ff569433555 __libc_start_main (libc.so.6)
                #13 0x0000000000400c4e _start (python3.6)

These Cores are harmless. The cores reported are during the upgrade and crashes during upgrade is due to system being stopped and modified.