Order to change service plan fails without any clear reason, error message is shown:
Service Plan change for Subscription #name failed.
The source or destination service plan is based on PEMGATE but has some DUMMYGATE resources included. Order to switch to such service plan fails due to the bug #PBA-82341 ("It is impossible to switch subscription plan to PEMGATE plan which has a dummygate resources").
Please contact your TAM/PTA Team to clarify the status of #PBA-82341.