I have problem with checkout, when i click to place order from magento onepage checkout it says
"There was error processing your order, please try again later."
I don't know why this is happening. Tried changing log folder permissions and clearing the cache but not worked. This is my exception.log.
2017-01-03T13:32:19+00:00 ERR (3):
exception 'Mage_Eav_Model_Entity_Attribute_Exception' with message 'The value of attribute "SKU" must be unique' in /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Core/Model/Config.php:1354
Stack trace:
#0 /home1/elements/public_html/drsilver.in/dr/app/Mage.php(463): Mage_Core_Model_Config->getModelInstance('eav/entity_attr...', 'The value of at...')
#1 /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Eav/Model/Entity/Abstract.php(661): Mage::getModel('eav/entity_attr...', 'The value of at...')
#2 /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Eav/Model/Entity/Abstract.php(830): Mage_Eav_Model_Entity_Abstract->walkAttributes('backend/validat...', Array)
#3 /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Catalog/Model/Product.php(189): Mage_Eav_Model_Entity_Abstract->validate(Object(Mage_Catalog_Model_Product))
#4 /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Adminhtml/controllers/Catalog/ProductController.php(1078): Mage_Catalog_Model_Product->validate()
#5 /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Adminhtml_Catalog_ProductController->quickCreateAction()
#6 /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('quickCreate')
#7 /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#8 /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#9 /home1/elements/public_html/drsilver.in/dr/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#10 /home1/elements/public_html/drsilver.in/dr/index.php(83): Mage::run('', 'store')
#11 {main}
2017-01-03T13:32:28+00:00 ERR (3):
exception 'Mage_Eav_Model_Entity_Attribute_Exception' with message 'The value of attribute "SKU" must be unique' in /home1/elements/public_html/drsilver.in/dr/app/code/core/Mage/Core/Model/Config.php:1354
Stack trace:
#0 /home1/elements/public_html/drsilver.in/dr/app/Mage.php(463): Mage_Core_Model_Config->getModelInstance('eav/entity_attr...', 'The value of at...')