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https://jazz.net/forum/questions/174172/how-do-you-get-out-of-the-state-the-server-is-currently-in-read-only-mode-because-a-migration-is-in-progress-in-order-to-preserve-data-integrity-you-will-not-be-able-to-make-changes-to-the-server-during-this-time/174192