diff --git a/db/changes/234001/00-updateWeight.sql b/db/changes/234001/00-updateWeight.sql
index 6f224667d..29c3ef8ae 100644
--- a/db/changes/234001/00-updateWeight.sql
+++ b/db/changes/234001/00-updateWeight.sql
@@ -1,49 +1,11 @@
--- algunas medias se quedan muy fuera de lugar
-UPDATE `vn`.`item` i 
-        JOIN(
-            SELECT typeFk, AVG(`size`) `size`
-                FROM vn.item
-                    WHERE `size` > 0
-                        AND `size` IS NOT NULL
-                GROUP BY typeFk
-        ) sub ON sub.typeFk = i.typeFk
-    SET i.`size` = sub.`size`
-        WHERE i.`size` IS NULL;
-
-ALTER TABLE `vn`.`item` MODIFY COLUMN `size` int(10) NOT NULL;
-
-UPDATE `vn`.`item` i 
-    JOIN(
-        SELECT typeFk, AVG(weightByPiece / `size`)  grams
-            FROM vn.item
-                WHERE weightByPiece IS NOT NULL 
-                    AND weightByPiece > 0
-                    AND `size` > 0
-                    AND `size` IS NOT NULL
-            GROUP BY typeFk
-    ) sub ON sub.typeFk = i.typeFk
-    SET i.weightByPiece = sub.grams * `size`
-    WHERE weightByPiece IS NULL
-        OR weightByPiece = 0;
+ALTER TABLE `vn`.`item` MODIFY COLUMN `size` int(10) NOT NULL DEFAULT ;
 
 ALTER TABLE `vn`.`item` 
     MODIFY COLUMN weightByPiece int(10) NOT NULL 
-        COMMENT 'peso por defecto para un articulo por tallo/unidad';
-
--- revisar algunos se quedan fuera
-
-UPDATE `vn`.`buy` b
-    SET b.packing = IFNULL(b.grouping, 0) * 2
-    WHERE b.packing IS NULL;
+        COMMENT 'peso por defecto para un articulo por tallo/unidad' DEFAULT ;
 
 ALTER TABLE `vn`.`buy` 
     MODIFY COLUMN packing int(11) 
     DEFAULT 0 NOT NULL;
 
-UPDATE `vn`.`buy` b
-        JOIN `vn`.`item` i ON i.id = b.itemFk
-    SET b.weight = (i.weightByPiece * b.packing) / 1000
-    WHERE weight IS NULL
-        OR weight = 0;
-
 ALTER TABLE `vn`.`buy` MODIFY COLUMN `weight` decimal(10,2) NOT NULL;
\ No newline at end of file