Установка VirtualBox 6.1.22 конфликтует с установленной версией 6.0.20

Документ, на который вы ссылаетесь , содержит следующие определения:

• kernel.sched_latency_ns
  sched_latency_ns is the initial value for the scheduler period.  The scheduler period is a period of time during which all runnable tasks should be allowed to run at least once.  While CFS has no concept of time slices, you can think of the period as the initial chunk of time which is then divided evenly into timeslices, one for each runnable process.  Note that this tunable only specifies the initial value.  When too many tasks become runnable the scheduler will use kernel.sched_min_granularity_ns instead.
  /usr/share/doc/kernel-doc-2.6.32/Documentation/scheduler/sched-design-CFS.txt

• kernel.sched_min_granularity_ns
  sched_min_granularity_ns specifies the target minimum scheduler period in which a single task will run.  This tunable is used only when running load is high.  Unlike sched_latency_ns, this tunable specifies the target period allocated for each task to run rather than the time in which all tasks should be run once.

Итак, веб-страница уже исправлена ​​— там написано «Обновлено 2018 -08 -30T21 :11 :42+00 :00»; т. е. около четырех дней назад; через две недели после того, как вы разместили свой вопрос.