diff --git a/models/sale_order.py b/models/sale_order.py
index 5331fe1a157..3324dce2d2a 100644
--- a/models/sale_order.py
+++ b/models/sale_order.py
@@ -216,13 +216,24 @@ class SaleOrder(models.Model):
         self.write({'order_line': [(0, False, value) for value in self._get_reward_line_values(program)]})
 
     def _create_reward_coupon(self, program):
-        coupon = self.env['sale.coupon'].create({
-            'program_id': program.id,
-            'state': 'reserved',
-            'partner_id': self.partner_id.id,
-            'order_id': self.id,
-            'discount_line_product_id': program.discount_line_product_id.id
-        })
+        # if there is already a coupon that was set as expired, reactivate that one instead of creating a new one
+        coupon = self.env['sale.coupon'].search([
+            ('program_id', '=', program.id),
+            ('state', '=', 'expired'),
+            ('partner_id', '=', self.partner_id.id),
+            ('order_id', '=', self.id),
+            ('discount_line_product_id', '=', program.discount_line_product_id.id),
+        ], limit=1)
+        if coupon:
+            coupon.write({'state': 'reserved'})
+        else:
+            coupon = self.env['sale.coupon'].create({
+                'program_id': program.id,
+                'state': 'reserved',
+                'partner_id': self.partner_id.id,
+                'order_id': self.id,
+                'discount_line_product_id': program.discount_line_product_id.id
+            })
         self.generated_coupon_ids |= coupon
         return coupon