| <?xml version="1.0" encoding="UTF-8"?> | 
| <ValidationRule xmlns="http://soap.sforce.com/2006/04/metadata"> | 
|     <fullName>Rental_Apply_Cannot_Modify_Model</fullName> | 
|     <active>true</active> | 
|     <errorConditionFormula>NOT(ISBLANK(Rental_Apply_Equipment_Set_Detail__c)) && RepairSource__c = '备品修理' &&  | 
| Ischanged(Delivered_Product__c)</errorConditionFormula> | 
|     <errorDisplayField>Delivered_Product__c</errorDisplayField> | 
|     <errorMessage>有关联的借出一览明细,不能修改设备型号。</errorMessage> | 
| </ValidationRule> |