I have strange problem. I made a test ticket and now I can´t change customer info. If I go to zoom ticket => Customer => Set customer user and customer id of a ticket => I can put the CustomerID but if I put something to Customer User box, it clears all the boxes. So I can put only customerID, not customer user.

Now when there is not any customer info, when I close the case, it always comes back to the system because there is no customer email, where the system sends the closing email.

What can I do to get rid of this test case?

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Annika