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数据库的Service Broker在通过备份/还原方式恢复数据库后，通过SELECT * FROM sys.transmission_queue 查到的错误信息：

An exception occurred while enqueueing a message in the target queue. Error: 15517, State: 1. Cannot execute as the database principal because the principal "dbo" does not exist, this type of principal cannot be impersonated, or you do not have permission.

解决办法：

ALTER AUTHORIZATION ON DATABASE::[yourdatabase] TO [sa];

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