Magento

After installing the extension my site only shows up this error message:

Error in file: “/var/www/web10/web/app/code/core/Mage/Catalog/sql/catalog_setup/mysql4-upgrade-0.7.33-0.7.34.php” - SQLSTATE[42000]: Syntax error or access violation: 1061 Duplicate key name ‘UNQ_CATEGORY_PRODUCT’
Trace:
#0 /var/www/web10/web/app/code/core/Mage/Core/Model/Resource/Setup.php(278): Mage::exception(’Mage_Core’, ‘Error in file: ...’)
#1 /var/www/web10/web/app/code/core/Mage/Core/Model/Resource/Setup.php(170): Mage_Core_Model_Resource_Setup->_modifyResourceDb(’upgrade’, ‘0.7.33’, ‘0.7.34’)
#2 /var/www/web10/web/app/code/core/Mage/Core/Model/Resource/Setup.php(135): Mage_Core_Model_Resource_Setup->_upgradeResourceDb(’0.7.33’, ‘0.7.34’)
#3 /var/www/web10/web/app/code/core/Mage/Core/Model/Resource/Setup.php(111): Mage_Core_Model_Resource_Setup->applyUpdates()
#4 /var/www/web10/web/app/code/core/Mage/Core/Model/Config.php(195): Mage_Core_Model_Resource_Setup::applyAllUpdates()
#5 /var/www/web10/web/app/code/core/Mage/Core/Model/App.php(208): Mage_Core_Model_Config->init(Array)
#6 /var/www/web10/web/app/Mage.php(404): Mage_Core_Model_App->init(’default’, ‘store’, Array)
#7 /var/www/web10/web/app/Mage.php(423): Mage::app(’default’, ‘store’, Array)
#8 /var/www/web10/web/index.php(40): Mage::run(’default’)
#9 {main}

Any ideas?