I have changed the new installation number for DEV, QAS and PRD system recently. There is no major hardware migration though, we simply changed the new license in all systems as advised by our SAP VAR.
Then I tried to apply new Migration Key for Secure Storage in SMP, and found that the new installation key appeared under the 'Select Old Installation and Enter Old System ID'. So I'm unable to proceed with Create Key.
Someone suggested a solution for this, that is to delete STMS config and recreate the new STMS, thus it will recreate the RFC with correct login data.
Can anyone help to confirm whether the suggestion could solve the problem?