You have a test system which is de-coupled from your production system. You now want to request a test system or a data migration test system for a change project on the current test system. But after the request, you do not get any notification about the new system.
According the logic of SAP Bydesign, we are not able to request a test system from a test system.
Please re-create the change project on your production system and request a test system from the production system.
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