Hi, @Mo Alom
Thank you for posting in Microsoft Q&A forum.
Are you using a test environment or a production environment?
The message in the docs means:
We have to make sure our internet client management won't get impacted when we perform this displacement action in a production environment. We should have an additional CMG for internet client management.
If you are using a test environment, it's OK to delete it and recreate it with the same service name, but your test internet client will temporarily lose management.
Here is a guidance for you to properly remove SCCM CMG:
https://www.anoopcnair.com/remove-sccm-cmg/
(Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.)
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