Home » Magento19 August 2017

Magento Error: Item (Mage_Core_Model_Store) with the same id “0” already exist


I transferred my Magento site files from one computer to another (it can be from local computer to online or from development site to production site). I imported the database. Now, when I try to browse the new location’s site, I get the following error:

There has been an error processing your request
Item (Mage_Core_Model_Store) with the same id “0” already exist


There can be multiple rows inserted with the same value in tables core_store, core_website and core_store_group.

You have to delete such duplicate rows from core_store, core_website and core_store_group table. That is, if you have three rows with same value then remove the two duplicate rows.

After that, Refresh Cache from System -> Cache Management.

That’s all. This should solve the error.

Hope this helps. Thanks.


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