Hi you can drop down to the earlier kernel of 6.14 by following my earlier reply. There is a way to prevent that kernel from being installed again, but first you need to remove it after logging in using 6.14.
Install Synaptic Package Manager (it's in Software), and on launch you will need to enter your login password to elevate to root.
Next click on search button, then in the box that appears, type kernel.
This should then come back with all the kernels installed on your system. To ensure all installed elements get to the top, click on the small 's' that appears above the tiny squares in the column to the left of each pkg name; this brings all installed pkgs to the top of the screen. Right-click on the green square next to the kernel you wish to remove and select 'Mark for complete removal', then click on Apply.
There is a way to prevent 6.17 from getting reinstalled by holding it back, will post back later.
You could follow @Aravisian 's excellent guide on how to install a newer/higher kernel here:
How to prevent 6.17 being installed again - see @Aravisian 's reply to a similar instance here: