diff --git a/modules/ticket/back/methods/sale/updateDiscount.js b/modules/ticket/back/methods/sale/updateDiscount.js
index 18ad5eb33..6eaf2cb12 100644
--- a/modules/ticket/back/methods/sale/updateDiscount.js
+++ b/modules/ticket/back/methods/sale/updateDiscount.js
@@ -26,24 +26,20 @@ module.exports = Self => {
             throw new UserError(`The value should be a number`);
 
         let model = Self.app.models;
-        let ticket = await model.Ticket.find({
-            where: {
-                id: params.editLines[0].ticketFk
-            },
-            include: [{
+        let ticket = await model.Ticket.findById(params.editLines[0].ticketFk, {
+            include: {
                 relation: 'client',
                 scope: {
                     fields: ['salesPersonFk']
                 }
-            }],
-            fields: ['id', 'clientFk', 'refFk']
+            },
         });
 
         if (ticket.refFk)
             throw new UserError(`The sales of this ticket can't be modified`);
 
         let componentToUse;
-        let usesMana = await model.WorkerMana.findOne({where: {workerFk: ticket[0].client().salesPersonFk}, fields: 'amount'});
+        let usesMana = await model.WorkerMana.findOne({where: {workerFk: ticket.client().salesPersonFk}, fields: 'amount'});
 
         if (usesMana)
             componentToUse = 37;
@@ -61,7 +57,7 @@ module.exports = Self => {
         if (usesMana) {
             query = `
             call vn.manaSpellersRequery(?)`;
-            await Self.rawSql(query, [ticket[0].client().salesPersonFk]);
+            await Self.rawSql(query, [ticket.client().salesPersonFk]);
         }
     };
 };
diff --git a/modules/ticket/front/sale/editDiscount.js b/modules/ticket/front/sale/editDiscount.js
index 34dc0c48e..3df684ff3 100644
--- a/modules/ticket/front/sale/editDiscount.js
+++ b/modules/ticket/front/sale/editDiscount.js
@@ -44,13 +44,14 @@ class Controller {
         }
         if (modified) {
             this.$http.post(`/ticket/api/Sales/updateDiscount`, {editLines}).then(() => {
-                this.onHide();
                 this.vnApp.showSuccess(this.$translate.instant('Data saved!'));
                 this.clear();
                 modified = false;
             }).catch(e => {
                 this.vnApp.showError(e.data.error.message);
             });
+
+            this.onHide();
         } else
             this.vnApp.showError(this.$translate.instant('There is no changes to save'));
     }
diff --git a/modules/ticket/front/sale/index.html b/modules/ticket/front/sale/index.html
index d57c0b7c2..8cd345e79 100644
--- a/modules/ticket/front/sale/index.html
+++ b/modules/ticket/front/sale/index.html
@@ -134,7 +134,7 @@
                         <vn-td number ng-if="!$ctrl.isEditable">
                             {{sale.price | currency: 'EUR':2}}
                         </vn-td>
-                        <vn-td number ng-if="$ctrl.isEditable">
+                        <vn-td number ng-if="!$ctrl.ticket.refFk">
                             <span class="link"
                                 vn-tooltip="Edit discount"
                                 ng-click="$ctrl.showEditPopover($event, sale)">
diff --git a/modules/ticket/front/sale/index.js b/modules/ticket/front/sale/index.js
index 16b668c4e..9ebebf7b5 100644
--- a/modules/ticket/front/sale/index.js
+++ b/modules/ticket/front/sale/index.js
@@ -14,7 +14,7 @@ class Controller {
         this.moreOptions = [
             {callback: this.markAsReserved, name: 'Mark as reserved'},
             {callback: this.unmarkAsReserved, name: 'Unmark as reserved'},
-            {callback: this.showEditDialog, name: 'Update discount'},
+            {callback: this.showEditDialog, name: 'Update discount', show: () => !this.hasInvoice()},
             {callback: this.createClaim, name: 'Add claim'},
             {callback: this.showSMSDialog, name: 'Send SMS'}
         ];
@@ -60,7 +60,13 @@ class Controller {
     }
 
     onMoreOpen() {
-        let options = this.moreOptions.filter(o => o.always || this.isChecked);
+        let options = this.moreOptions.filter(option => {
+            const hasShowProperty = Object.hasOwnProperty.call(option, 'show');
+            const shouldShow = !hasShowProperty || option.show === true ||
+                typeof option.show === 'function' && option.show();
+
+            return (shouldShow && (option.always || this.isChecked));
+        });
         this.$scope.moreButton.data = options;
     }
 
@@ -337,6 +343,15 @@ class Controller {
         };
         this.$scope.sms.open();
     }
+
+    /**
+     * Returns if the current ticket
+     * is already invoiced
+     * @return {Boolean} - True if invoiced
+     */
+    hasInvoice() {
+        return this.ticket.refFk !== null;
+    }
 }
 
 Controller.$inject = ['$scope', '$state', '$http', 'vnApp', '$translate'];