How to shorten kicks without changing the other kicks

[real marsh]

https://youtu.be/taOerVcGdPA?si=Zs2dBd0Jdii26Agu&t=606
Is there someone who knows how he can shorten that kick without changing the other kicks ?
he made them unique but when he changed one of the unique kicks the other unique kicks stayed the same length

[short prawn]

i dont exactly understand what you mean but maybe this is what you mean 💀

the kicks doesnt have to be unique