Can_Not_Change_Status_Cao_An true AND(OR(IsBlank(PRIORVALUE(Last_Assigned_Time__c)) && Not(IsBlank(Last_Assigned_Time__c)), Last_Assigned_Time__c > PRIORVALUE(Last_Assigned_Time__c)) , OR(ISPICKVAL(Status__c, '草案中') , ISPICKVAL( Status__c, '填写完毕') , ISPICKVAL( Status__c, '申请中') , ISPICKVAL( Status__c, '不批准') , ISPICKVAL( Status__c, '取消') , ISPICKVAL( Status__c, '删除') ) ) Status__c 已批准后才能分配