php - Mage registry key "_singleton/core/resource" already exists -

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mage registry key "_singleton/core/resource" exists

trace:

#0 /home/sourceciti/public_html/demo/nrrexports/demo/app/mage.php(223): mage::throwexception('mage registry k...') #1 /home/sourceciti/public_html/demo/nrrexports/demo/app/mage.php(477): mage::register('_singleton/core...', object(mage_core_model_resource)) #2 /home/sourceciti/public_html/demo/nrrexports/demo/app/code/core/mage/core/model/resource/setup.php(141): mage::getsingleton('core/resource') #3 /home/sourceciti/public_html/demo/nrrexports/demo/app/code/core/mage/core/model/resource/setup.php(234): mage_core_model_resource_setup->__construct('core_setup') #4 /home/sourceciti/public_html/demo/nrrexports/demo/app/code/core/mage/core/model/app.php(417): mage_core_model_resource_setup::applyallupdates() #5 /home/sourceciti/public_html/demo/nrrexports/demo/app/code/core/mage/core/model/app.php(343): mage_core_model_app->_initmodules() #6 /home/sourceciti/public_html/demo/nrrexports/demo/app/mage.php(684): mage_core_model_app->run(array) #7 /home/sourceciti/public_html/demo/nrrexports/demo/index.php(87): mage::run('', 'store') #8 {main}

hello guys getting error,and design has gone,please me how solve this,please guys

first try clearing cache of magento.

if issue still exists, check whether have created or installed module or extension has observer class.

if yes, check declaration , match config.xml has correct way of declaration of observer.

after clear magento cache again.


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