无法解密当前的主密钥。如果这是数据库主密钥，则在执行此操作之前，应尝试在会话中打开它。可以使用 FORCE 选项忽略此错误并继续此操作，但使用该旧主密钥加密的数据将丢失。

The current master key cannot be decrypted. If this is a database master key, you should attempt to open it in the session before performing this operation. The FORCE option can be used to ignore this error and continue the operation but the data encrypted by the old master key will be lost.