MAGETWO-69714: Cannot delete product tier-prices

Author: rganin

app/code/Magento/Catalog/Model/Product/Attribute/Backend/Tierprice.php

@@ -180,15 +180,8 @@ protected function updateValues(array $valuesToUpdate, array $oldValues)
     {
         $isChanged = false;
         foreach ($valuesToUpdate as $key => $value) {
-            $oldPrice = $this->prepareFloatValue($oldValues[$key]['price']);
-            $newPrice = $this->prepareFloatValue($value['value']);
-            $oldQty = $this->prepareFloatValue($oldValues[$key]['price_qty']);
-            $newQty = $this->prepareFloatValue($value['qty']);
-            $oldPercentageValue = $this->prepareFloatValue($this->getPercentage($oldValues[$key]));
-            $newPercentageValue = $this->prepareFloatValue($this->getPercentage($value));
-            if (($oldPrice !== $newPrice)
-                || ($oldQty !== $newQty)
-                || ($oldPercentageValue !== $newPercentageValue)
+            if ($oldValues[$key]['price'] != $value['value']
+                || $this->getPercentage($oldValues[$key]) != $this->getPercentage($value)
             ) {
                 $price = new \Magento\Framework\DataObject(
                     [
@@ -205,17 +198,6 @@ protected function updateValues(array $valuesToUpdate, array $oldValues)
         return $isChanged;
     }
 
-    /**
-     * Prepare float value for comparison
-     *
-     * @param string|float|int $value
-     * @return float
-     */
-    private function prepareFloatValue($value)
-    {
-        return floatval(str_replace(',', '.', (string)$value));
-    }
-
     /**
      * Check whether price has percentage value.
      *