diff --git a/modules/ticket/back/models/sale.js b/modules/ticket/back/models/sale.js
index 1c86ddc0c..99cfeeeea 100644
--- a/modules/ticket/back/models/sale.js
+++ b/modules/ticket/back/models/sale.js
@@ -33,6 +33,7 @@ module.exports = Self => {
         const itemId = changes?.itemFk || instance?.itemFk;
         const oldQuantity = instance?.quantity ?? null;
         const quantityAdded = newQuantity - oldQuantity;
+        const isReduction = oldQuantity && newQuantity <= oldQuantity;
 
         const ticket = await models.Ticket.findById(
             ticketId,
@@ -80,16 +81,17 @@ module.exports = Self => {
         ctx.options);
 
         const [itemInfo] = await models.Sale.rawSql(`SELECT available FROM tmp.ticketCalculateItem`, null, ctx.options);
+        const available = itemInfo?.available;
 
-        if (!itemInfo?.available || itemInfo.available < quantityAdded)
+        if ((!isReduction && !available) || available < quantityAdded)
             throw new UserError(`This item is not available`);
 
         if (await models.ACL.checkAccessAcl(ctx, 'Ticket', 'isRoleAdvanced', '*')) return;
 
-        if (newQuantity < item.minQuantity && newQuantity != itemInfo?.available)
+        if (newQuantity < item.minQuantity && newQuantity != available)
             throw new UserError('The amount cannot be less than the minimum');
 
-        if (ctx.isNewInstance || newQuantity <= oldQuantity) return;
+        if (ctx.isNewInstance || isReduction) return;
 
         const [saleGrouping] = await models.Sale.rawSql(`
             SELECT t.price newPrice