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1.连接数据库,找名称带 studio 的库 2.点击进去后,找到表名称是:studio_projects 3.打开表,找到字段名称:ParameterLockerUserID,如果有字段,清空就好 4.null 设置完成后,如果是用 navicat 看,应该是像下面这样: