ACP2E-2583: base_discount_canceled column is not updating properly

Author: Anna Bukatar

app/code/Magento/Sales/Model/Order.php

@@ -1378,9 +1378,11 @@ public function registerCancellation($comment = '', $graceful = true)
             $this->setShippingCanceled($this->getShippingAmount() - $this->getShippingInvoiced());
             $this->setBaseShippingCanceled($this->getBaseShippingAmount() - $this->getBaseShippingInvoiced());
 
-            $this->setDiscountCanceled(abs((float) $this->getDiscountAmount()) - $this->getDiscountInvoiced());
+            $this->setDiscountCanceled(
+                abs((float) $this->getDiscountAmount()) - abs((float) $this->getDiscountInvoiced()))
+            ;
             $this->setBaseDiscountCanceled(
-                abs((float) $this->getBaseDiscountAmount()) - $this->getBaseDiscountInvoiced()
+                abs((float) $this->getBaseDiscountAmount()) - abs((float) $this->getBaseDiscountInvoiced())
             );
 
             $this->setTotalCanceled($this->getGrandTotal() - $this->getTotalPaid());