After clicking manage categories in the back end of magento I have received this:
There has been an error processing your request Source model "mageplaza_seo/source_robots" not found for attribute "meta_robots"
#0 /home/tapisdor/public_html/app/code/core/Mage/Eav/Model/Entity/Attribute/Abstract.php(387): Mage::exception('Mage_Eav', 'Source model "m...')
Error log record number: 1450270382448
I understand it has to do with an extension that I have removed. But if I removed it on magento connect manager, why is this showing up?