why we need to change SID of the VM after cloning the vm

Reasons:

Machines with the same SID will not be able to join to the domain. From Microsoft system point of view, SID should be unique for every computer device that connected to the Active Directory.
Read More: https://www.raymond.cc/blog/how-to-use-sysprep-to-generate-unique-sid-before-cloning/

any other updates ? on changing the SID of the system.

Regards

Basavaraj.R Navalgund

banavalg@yahoo.com