diff --git a/src/main/java/com/xujie/sys/modules/sampletracking/service/impl/SampleTrackingServiceImpl.java b/src/main/java/com/xujie/sys/modules/sampletracking/service/impl/SampleTrackingServiceImpl.java
index bff0508f..0ee7e22d 100644
--- a/src/main/java/com/xujie/sys/modules/sampletracking/service/impl/SampleTrackingServiceImpl.java
+++ b/src/main/java/com/xujie/sys/modules/sampletracking/service/impl/SampleTrackingServiceImpl.java
@@ -346,6 +346,7 @@ public class SampleTrackingServiceImpl implements SampleTrackingService {
         latestPart.setProjectId(npiProjectId);
         // 物料同步同样优先按业务键（site + projectId + testPartNo）定位，命中后执行更新。
         // 仅在业务键未命中时，才按 trackingId == npiId 兼容旧数据。
+        // 业务约束：命中已存在 NPI 物料时，不覆盖物料状态
         Integer npiProjectPartId = resolveMatchedNpiProjectPartId(trackingProjectPartId, npiProjectId, latestPart);
         if (npiProjectPartId == null) {
             ProjectPart insertPart = buildProjectPartForInsert(latestPart, operator);
diff --git a/src/main/resources/mapper/sampletracking/SampleTrackingMapper.xml b/src/main/resources/mapper/sampletracking/SampleTrackingMapper.xml
index 451287fd..9599fbc1 100644
--- a/src/main/resources/mapper/sampletracking/SampleTrackingMapper.xml
+++ b/src/main/resources/mapper/sampletracking/SampleTrackingMapper.xml
@@ -387,20 +387,6 @@
             remark = #{remark},
             need_date = #{needDate,jdbcType=DATE},
             c_project_region = #{cProjectRegion},
-            project_manager = #{projectManager},
-            project_owner = #{projectOwner},
-            engineer = #{engineer},
-            c_quality_engineer1 = #{cQualityEngineer1},
-            c_quality_engineer2 = #{cQualityEngineer2},
-            c_quality_engineer3 = #{cQualityEngineer3},
-            c_quality_engineer4 = #{cQualityEngineer4},
-            c_quality_engineer5 = #{cQualityEngineer5},
-            c_quality_engineer6 = #{cQualityEngineer6},
-            c_manufacture_engineer = #{cManufactureEngineer},
-            doc_engineer = #{docEngineer},
-            doc_engineer2 = #{docEngineer2},
-            ipqc_hard_tag = #{ipqcHardTag},
-            c_quality_engineer7 = #{cQualityEngineer7},
             project_creation_date = #{projectCreationDate,jdbcType=DATE},
             project_close_date = #{projectCloseDate,jdbcType=DATE},
             update_date = GETDATE(),
@@ -489,7 +475,6 @@
             c_manufacture_engineer = #{cManufactureEngineer},
             close_date = #{closeDate,jdbcType=DATE},
             engineer = #{engineer},
-            status = #{status},
             priority = #{priority},
             project_category = #{projectCategory},
             need_date = #{needDate,jdbcType=DATE},