Via @OrangeDog on Gitter:

This table doesn't make much sense https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-3.0.0-M1-Configuration-Changelog The columns seem to be "default value" and "description" rather than "replacement" and "reason"

Comment From: snicoll

I've fixed the tool that we use to generate the changelog and updated the existing page.