diff --git a/blade-service/blade-wms/src/main/java/org/springblade/wms/mapper/StStockInoutRecordMapper.xml b/blade-service/blade-wms/src/main/java/org/springblade/wms/mapper/StStockInoutRecordMapper.xml
index 7a9d29a52..e0ef2886a 100644
--- a/blade-service/blade-wms/src/main/java/org/springblade/wms/mapper/StStockInoutRecordMapper.xml
+++ b/blade-service/blade-wms/src/main/java/org/springblade/wms/mapper/StStockInoutRecordMapper.xml
@@ -154,9 +154,11 @@
     <select id="getMaxPiNo" resultType="java.lang.String">
         SELECT PI_NO
         FROM ST_STOCK_INOUT_RECORD
-        WHERE PI_NO LIKE #{format} || '%'
-          AND ROWNUM = 1
-        ORDER BY PI_NO DESC
+        WHERE ROWID = (
+            SELECT MAX(ROWID) KEEP (DENSE_RANK LAST ORDER BY PI_NO)
+            FROM ST_STOCK_INOUT_RECORD
+            WHERE PI_NO LIKE #{format} || '%'
+        )
             FOR UPDATE
     </select>