Well, resetting "labs" is actually terminating an old instance and getting a new one (from my perspective), which works fine. I am talking about resetting my learning process that matches with the instance, because the instance uses the items created in the "previous" learning tasks. These two are not matched if I start a new instance and this caused the issues.
I understand resetting the learning tasks may involve other things, so I am trying to work around to see if I can move on. Thanks for your help.
