feat: 规格变更后ID：afterId 将原来的物料行Id值赋给afterId，自己新增的数据不需要

@@ -303,7 +303,7 @@ export default {
             delete next.id
             delete next.status
             this.form = next
-            const lines = Array.isArray(item.purchaseOrderLineList) ? item.purchaseOrderLineList.map(x => ({ ...x, purchaseOrderId: x.id, id: '' })) : []
+            const lines = Array.isArray(item.purchaseOrderLineList) ? item.purchaseOrderLineList.map(x => ({ ...x, purchaseOrderId: x.id, afterId: x.id, id: '' })) : []
             this.initPurchaseOrderLineList = lines
             const sum = lines.reduce((acc, it) => {
               const v = Number(it && it.quantity)