If you only want to use 5.4, you could delete the others.
Otherwise, this forum has a search function which will reveal this thread: How to make a Kernel default? - #3 by linux-aarhus
If you only want to use 5.4, you could delete the others.
Otherwise, this forum has a search function which will reveal this thread: How to make a Kernel default? - #3 by linux-aarhus