diff --git a/db/routines/vn/procedures/expeditionPallet_build.sql b/db/routines/vn/procedures/expeditionPallet_build.sql
index a33439061..2df73bb85 100644
--- a/db/routines/vn/procedures/expeditionPallet_build.sql
+++ b/db/routines/vn/procedures/expeditionPallet_build.sql
@@ -5,26 +5,22 @@ CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`expeditionPallet_buil
 	vWorkerFk INT,
 	OUT vPalletFk INT
 )
-proc: BEGIN
-/** 
- * Builds an expedition pallet.
+BEGIN
+/** Construye un pallet de expediciones.
  *
- * First, it checks if these expeditions already belong to another pallet,
- * in which case it returns an error.
+ * Primero comprueba si esas expediciones ya pertenecen a otro pallet,
+ * en cuyo caso actualiza ese pallet.
  *
- * @param vExpeditions JSON_ARRAY with this structure [exp1, exp2, exp3, ...]
- * @param vArcId INT Identifier of arcRead
- * @param vWorkerFk INT Identifier of worker
- * @param out vPalletFk Identifier of expeditionPallet
+ * @param vExpeditions JSON_ARRAY con esta estructura [exp1, exp2, exp3, ...]
+ * @param vArcId INT Identificador de arcRead
+ * @param vWorkerFk INT Identificador de worker
+ * @param out vPalletFk Identificador de expeditionPallet
  */
-
 	DECLARE vCounter INT;
 	DECLARE vExpeditionFk INT;
 	DECLARE vTruckFk INT;
 	DECLARE vPrinterFk INT;
 	DECLARE vExpeditionStateTypeFk INT;
-	DECLARE vFreeExpeditionCount INT;
-	DECLARE vExpeditionWithPallet INT;
 
 	CREATE OR REPLACE TEMPORARY TABLE tExpedition (
 		expeditionFk INT,
@@ -48,63 +44,48 @@ proc: BEGIN
 				WHERE e.id = vExpeditionFk;
 	END WHILE;
 
-	SELECT COUNT(expeditionFk) INTO vFreeExpeditionCount 
-		FROM tExpedition 
-		WHERE palletFk IS NULL;
-
-	SELECT COUNT(expeditionFk) INTO vExpeditionWithPallet
-		FROM tExpedition 
-		WHERE palletFk;
-
-	IF vExpeditionWithPallet THEN
-		UPDATE arcRead 
-			SET error = (
-				SELECT GROUP_CONCAT(expeditionFk SEPARATOR ', ')
-					FROM tExpedition 
-					WHERE palletFk
-			)
-		WHERE id = vArcId;
-		LEAVE proc;
-	END IF;
-
-	IF NOT vFreeExpeditionCount THEN
-		CALL util.throw ('NO_FREE_EXPEDITIONS');
-	END IF;
-
-	SELECT roadmapStopFk INTO vTruckFk
+	SELECT palletFk INTO vPalletFk
 		FROM (
-			SELECT rm.roadmapStopFk, count(*) n
-				FROM routesMonitor rm
-					JOIN tExpedition e ON e.routeFk = rm.routeFk
-				WHERE e.palletFk IS NULL
-				GROUP BY roadmapStopFk
+			SELECT palletFk, count(*) n
+				FROM tExpedition
+					WHERE palletFk > 0
+				GROUP BY palletFk
 				ORDER BY n DESC
-				LIMIT 1
-		) sub;
+				LIMIT 100 
+		) sub
+		LIMIT 1;
 
-	IF vTruckFk IS NULL THEN
-		CALL util.throw ('TRUCK_NOT_AVAILABLE');
+	IF vPalletFk IS NULL THEN
+		SELECT roadmapStopFk INTO vTruckFk
+			FROM (
+				SELECT rm.roadmapStopFk, count(*) n
+					FROM routesMonitor rm
+						JOIN tExpedition e ON e.routeFk = rm.routeFk
+					GROUP BY roadmapStopFk
+					ORDER BY n DESC
+					LIMIT 1
+			) sub;
+
+		IF vTruckFk IS NULL THEN
+				CALL util.throw ('TRUCK_NOT_AVAILABLE');
+		END IF;
+
+		INSERT INTO expeditionPallet SET truckFk = vTruckFk;
+
+		SET vPalletFk = LAST_INSERT_ID();
 	END IF;
 
-	INSERT INTO expeditionPallet SET truckFk = vTruckFk;
-
-	SET vPalletFk = LAST_INSERT_ID();
-
 	INSERT INTO expeditionScan(expeditionFk, palletFk, workerFk)
 		SELECT expeditionFk, vPalletFk, vWorkerFk
 			FROM tExpedition
-			WHERE palletFk IS NULL;
+			ON DUPLICATE KEY UPDATE palletFk = vPalletFk, workerFk = vWorkerFk;
 
 	SELECT id INTO vExpeditionStateTypeFk
 		FROM expeditionStateType
 		WHERE code = 'PALLETIZED';
-	
-	INSERT INTO expeditionState(expeditionFk, typeFk)
-		SELECT expeditionFk, vExpeditionStateTypeFk 
-			FROM tExpedition
-			WHERE palletFk IS NULL;
 
-	UPDATE arcRead SET error = NULL WHERE id = vArcId;
+	INSERT INTO expeditionState(expeditionFk, typeFk)
+		SELECT expeditionFk, vExpeditionStateTypeFk FROM tExpedition;
 
 	SELECT printerFk INTO vPrinterFk FROM arcRead WHERE id = vArcId;