/etc/passwd.org, /etc/group.org, /etc/shadow.org files

On a Debian 10 server, which started as Debian 7 and updated whenever new version came out, I accidentally found these three files:

/etc/passwd.org, /etc/group.org, /etc/shadow.org

The backup files /etc/passwd-, /etc/group-, /etc/shadow- and other *- files are present, as they should.

For example, all passwd files are (same applies for the other two):

$ ll /etc/passwd*
-rw-r--r-- 1 root root 2,1K Αυγ  13 14:08 /etc/passwd
-rw-r--r-- 1 root root 2,1K Αυγ  13 14:06 /etc/passwd-
-rw-r--r-- 1 root root 2,0K Ιουν 20  2015 /etc/passwd.org

Their last access time is somewhere in 2015. Their contents are on par with /etc/passwd, /etc/group, /etc/shadow, as they probably were some time in the past – I can see some deleted users. I cannot find any info of such *org files. Does anybody has any idea what are there *org files and what is their use?

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Author: Krackout