Apt Hold: Preventing upgrade

The evil things I did to Python2.7 to keep VirtualBox running...

 root@tolt:/home/dwrob/Downloads# ls -al *python*
 -rw-r--r-- 1 dwrob dwrob  394740 Sep 28 19:28 libpython2.7-minimal_2.7.16-2+deb10u1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob 1911924 Sep 28 19:26 libpython2.7-stdlib_2.7.16-2+deb10u1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob   20848 Sep 28 19:40 libpython2-stdlib_2.7.16-1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob   20836 Sep 28 19:39 libpython-stdlib_2.7.16-1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob   41616 Sep 28 19:38 python2_2.7.16-1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob   22840 Sep 28 19:33 python_2.7.16-1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob  304600 Sep 28 19:19 python2.7_2.7.16-2+deb10u1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob 1369052 Sep 28 19:25 python2.7-minimal_2.7.16-2+deb10u1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob   41352 Sep 28 19:36 python2-minimal_2.7.16-1_amd64.deb
 -rw-r--r-- 1 dwrob dwrob   20988 Sep 28 19:35 python-minimal_2.7.16-1_amd64.deb

 root@tolt:/home/dwrob/Downloads# apt-mark hold libpython2.7-minimal libpython2.7-stdlib libpython2-stdlib libpython-stdlib python2 python python2.7 python2.7-minimal python2-minimal python-minimal
 libpython2.7-minimal set on hold.
 libpython2.7-stdlib set on hold.
 libpython2-stdlib set on hold.
 libpython-stdlib set on hold.
 python2 set on hold.
 python set on hold.
 python2.7 set on hold.
 python2.7-minimal set on hold.
 python2-minimal set on hold.
 python-minimal set on hold.

 root@tolt:/home/dwrob/Downloads# apt-mark show hold
 E: Invalid operation show
 
 root@tolt:/home/dwrob/Downloads# apt-mark showhold
 libpython-stdlib
 libpython2-stdlib
 libpython2.7-minimal
 libpython2.7-stdlib
 python
 python-minimal
 python2
 python2-minimal
 python2.7
 python2.7-minimal