Hello,
Attempting to install specific version: mariadb 10.6.4 results in failure on a fresh Ubuntu server 20.04

Steps:
Install ubuntu server 20.04 from ISO.
Add mariadb repository to apt sources as in documentation, nothing special

run:
sudo apt-get install mariadb-server="1:10.6.4+maria~focal"

Error:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

*The following packages have unmet dependencies:
mariadb-server-10.6 : Conflicts: mariadb-server (< 1:10.6.5+maria~focal) but 1:10.6.4+maria~focal is to be installed*
E: Unable to correct problems, you have held broken packages.

Again, this is a fresh ISO installation.. why did this fail?
Thanks for your time.

When running apt-get install mariadb-server it works fine, but installs 10.6.5 and 10.6.4 is required.