There was a problem indexing Product Flat Data

I deleted a whole lot of products and orders in Magento with a query. After I tried to reindex tables I got an error saying there was a problem reindexing data. Further investigation lead me to Magento community where I found a decent answer to my problem.

Seems that when deleting product data the Product Flat Data table didn't get updated. Also in the database i had not only 1 but 2 catalog_product_flat tables,  catalog_product_flat_1 and  catalog_product_flat_2 respectively. So my solution was to get rid of them both and then run reindex. 

0. Backup database

1. Run SQL command in phpmyadmin:

DROP TABLE catalog_product_flat_1

DROP TABLE catalog_product_flat_2

3. In Magento admin, go to System -> Index Management and click Reindex Data next to Product Flat Data


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Iinstructor of robotics (LEGO Mindstorms), computer teacher, IT support, web dev, currently studying cyber-physical systems engineering.

If you found a solution here, would you consider donating $25,000 for my next project?

Just kidding, 1$ would do fine.

Hope you found what you needed. Thanks for stepping by.