grant application install error log

gistfile1.txt

CiviCRM_API3_Exception: "DB Error: already exists"

#0 /home/git-civicrm/civicrm-core/CRM/Admin/Form/Extensions.php(190): civicrm_api3("Extension", "install", (Array:2))
#1 /home/git-civicrm/civicrm-core/CRM/Core/Form.php(489): CRM_Admin_Form_Extensions->postProcess()
#2 /home/git-civicrm/civicrm-core/CRM/Core/StateMachine.php(160): CRM_Core_Form->mainProcess()
#3 /home/git-civicrm/civicrm-core/CRM/Core/QuickForm/Action/Next.php(61): CRM_Core_StateMachine->perform(Object(CRM_Admin_Form_Extensions), "next", "Next")
#4 /home/git-civicrm/civicrm-core/packages/HTML/QuickForm/Controller.php(203): CRM_Core_QuickForm_Action_Next->perform(Object(CRM_Admin_Form_Extensions), "next")
#5 /home/git-civicrm/civicrm-core/packages/HTML/QuickForm/Page.php(103): HTML_QuickForm_Controller->handle(Object(CRM_Admin_Form_Extensions), "next")
#6 /home/git-civicrm/civicrm-core/CRM/Core/Controller.php(351): HTML_QuickForm_Page->handle("next")
#7 /home/git-civicrm/civicrm-core/CRM/Core/Page/Basic.php(398): CRM_Core_Controller->run()
#8 /home/git-civicrm/civicrm-core/CRM/Core/Page/Basic.php(156): CRM_Core_Page_Basic->edit(1, NULL)
#9 /home/git-civicrm/civicrm-core/CRM/Admin/Page/Extensions.php(121): CRM_Core_Page_Basic->run()
#10 /home/git-civicrm/civicrm-core/CRM/Core/Invoke.php(309): CRM_Admin_Page_Extensions->run((Array:3), NULL)
#11 /home/git-civicrm/civicrm-core/CRM/Core/Invoke.php(84): CRM_Core_Invoke::runItem((Array:16))
#12 /home/git-civicrm/civicrm-core/CRM/Core/Invoke.php(52): CRM_Core_Invoke::_invoke((Array:3))
#13 /home/git-civicrm/civicrm-core/drupal/civicrm.module(445): CRM_Core_Invoke::invoke((Array:3))
#14 /home/cividemo.jmaconsulting.biz/htdocs/includes/menu.inc(527): civicrm_invoke("admin", "extensions")
#15 /home/cividemo.jmaconsulting.biz/htdocs/index.php(21): menu_execute_active_handler()
#16 {main}
 Sorry, due to an error, we are unable to fulfill your request at the moment. You may want to contact your administrator or service provider with more details about what action you were performing when this occurred.
DB Error: already exists