I am currently using conda version 24.7.1 on Ubuntu.
I removed cmake and reinstalled to version 3.30.
When I checked cmake version on base environment, it showed well that cmake version is updated.
However, when I checked on another environment, previously made before reinstalling cmake, it recognized cmake version as previous one.
I also tried conda update --name base conda, but it was not changed.
I could solve this problem by removing the environment then created again.
I installed cmake with makefile system, so it seems nonsense.
Does it still happen on conda version 24.7.2? If then, please check whether this can be solved.