Not possible to upload migration templates via migration cockpit app

[SAPSupport]

Hello,

I tried to upload the migration template via migration cockpit app in the sap test system and then i get error message "A system maintenance event is in process. Please try again later.

Could you please tell us what's the reason and downtime? when should we have access to upload the file again?

Currently we are in the cutover phase and we have to upload the templates to test system first in order to proceed with productive system later.

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[SAPSupport · Accepted solution]

Hello Team,

The Upgrade process has just begun in your system and during this period migration objects are locked for the upgrade. You can resume the services once we release the locks for the migration objects (mostly over the weekend)

You can check the below KBA.
https://me.sap.com/notes/2996675