diff --git a/doc/sql/mes/increase-260120.sql b/doc/sql/mes/increase-260120.sql
index 67748974..ed22eb3e 100644
--- a/doc/sql/mes/increase-260120.sql
+++ b/doc/sql/mes/increase-260120.sql
@@ -43,6 +43,6 @@ COMMENT ON COLUMN MES_ASSAY_CONTENT_DETAIL.ADD_VAL IS '添加量值';
 
 ALTER TABLE MES_RECORDER
     MODIFY (RECORDER NVARCHAR2(255));
-
-ALTER TABLE MES_RECORDER
-    MODIFY (MEMO CLOB);
\ No newline at end of file
+--varchar不允许修改为clob类型，所以先删除再添加
+ALTER TABLE MES_RECORDER DROP COLUMN MEMO;
+ALTER TABLE MES_RECORDER ADD (MEMO CLOB);
\ No newline at end of file