[Solved] fastboot set_active command does not exist

average joe Asks: fastboot set_active command does not exist
I am trying to root my Xiaom mi a2 phone. But i am stuck on changing the active partition. When i enter “fastboot set_active b” it doesnt execute the command. Instead i get a list off all available commands which doesnt contain an option to change the active partition.

Console-Output
enter image description here

I am following this tutorial: Tutorial

Ten-tools.com may not be responsible for the answers or solutions given to any question asked by the users. All Answers or responses are user generated answers and we do not have proof of its validity or correctness. Please vote for the answer that helped you in order to help others find out which is the most helpful answer. Questions labeled as solved may be solved or may not be solved depending on the type of question and the date posted for some posts may be scheduled to be deleted periodically. Do not hesitate to share your response here to help other visitors like you. Thank you, Ten-tools.