在 ALTER DATABASE SET WITNESS 命令的執行期間，三個伺服器執行個體全都沒有保持互連。可能沒有與資料庫相關聯的見證。請確認狀態，並在必要時重複命令。

All three server instances did not remain interconnected for the duration of the ALTER DATABASE SET WITNESS command. There may be no witness associated with the database. Verify the status and when necessary repeat the command.