Hi Axl,
Since the Microsoft Q&A community has a policy that the question author cannot accept their own answer. They can only accept answers by others, Summarized and posted the solution that you shared, request you to Accept the answer, it will benefit the community find the answers quickly.
Scenario:
Unknown compute target 'aml-cluster'.
Issue:
the aml-cluster, created during the lesson of Lab02 erased while deleting the rg-dp100-lasbs.
Resolution:
As the exercise in Unit-5 requires the prior exercises in Unit- 3&4 to be completed, we sometimes have to be careful while deleting the RG.
Thank you.