Fixed issue #19891

Fixed issue #19891 added check of attribute type_id

Author: Govind Sharma

app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Validate.php

@@ -105,7 +105,7 @@ public function execute()
             $attributeCode
         );
 
-        if ($attribute->getId() && !$attributeId || $attributeCode === 'product_type') {
+        if ($attribute->getId() && !$attributeId || $attributeCode === 'product_type' || $attributeCode === 'type_id') {
             $message = strlen($this->getRequest()->getParam('attribute_code'))
                 ? __('An attribute with this code already exists.')
                 : __('An attribute with the same code (%1) already exists.', $attributeCode);