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.

用SA用户登录执行下列语句

USE [xxxxx]
GO
EXEC dbo.sp_changedbowner @loginame = N'sa', @map = false
GO

-- 删除事务发布
use [IMIOTDB_CS]
exec sp_droppublication @publication = N'MMMMM'
GO