Issue: Incorrect decimal value: '' for column

XenForo_Exception: Database Error: UPDATE `vw_revision` SET `ratingcount` = 1, `ratingavg` = '' WHERE revisionid = 440 LIMIT 1 Mysqli statement execute error : Incorrect decimal value: '' for column `xxx_xxx`.`vw_revision`.`ratingavg` at row 1 - library/vw/_core/controller/db/xf.php:185
Generated By: Alfa, A moment ago

Stack Trace
#0 /library/vw/_core/controller/db/xf.php(169): vw_DB_Controller_XF->throw_error(Object(Zend_Db_Statement_Mysqli_Exception) , 'UPDATE `vw_rev...')
#1 /library/vw/_core/model/db/mysql/vw.php(1339): vw_DB_Controller_XF->query_write('UPDATE `vw_rev...')
#2 /library/vw/_core/model/db/mysql/vw.php(983): vw_DB_MySQL_Model->shutdown_or_run('UPDATE `vw_rev...', false)
#3 /library/vw/_core/model/rating/vw.php(281): vw_DB_MySQL_Model->update(Array)
#4 /library/vw/_install/lib/upgradepath/steps/4/1/0/rc/2/base/vw.php(1657): vw_Rating_Model->cache(Array, Array, NULL, 0)
#5 /library/vw/_install/lib/upgradepath/steps/4/1/0/rc/2/base/vw.php(1082): vw_Install_UpgradePath_Steps_410rc2_base_Controller->build_rating_scores(Object(vw_Install_UpgradePath_Contro ller_XF), true, 'Revision')
#6 /library/vw/_core/controller/progress/steps/vw.php(85): vw_Install_UpgradePath_Steps_410rc2_base_Controller->{closure}(Object(vw_Install_UpgradePath_Controller_XF) , true)
#7 /library/vw/_core/controller/progress/steps/vw.php(56): vw_Progress_Steps_Controller->call(Object(vw_Install_UpgradePath_Controller_XF), Object(Closure))
#8 /library/vw/_install/lib/upgradepath/vw.php(78): vw_Progress_Steps_Controller->execute(Object(vw_Install_UpgradePath_Controller_XF))
#9 /library/vw/_core/controller/progress/vw.php(169): vw_Install_UpgradePath_Controller->exec_script(Array)
#10 /library/vw/_core/view/response/progress/vw.php(27): vw_Progress_Controller->execute()
#11 /library/vw/_core/view/response/progress/vw.php(63): vw_Response_Progress_View->stream()
#12 /library/vw/XenForo/ViewAdmin.php(67): vw_Response_Progress_View->render()
#13 /library/XenForo/ViewRenderer/Abstract.php(229): vw_XenForo_ViewAdmin->renderRaw()
#14 /library/XenForo/ViewRenderer/Raw.php(53): XenForo_ViewRenderer_Abstract->renderViewObject('vw_XenForo_View...', 'Raw', Array, 'vw_general_view')
#15 /library/XenForo/FrontController.php(624): XenForo_ViewRenderer_Raw->renderView('vw_XenForo_View...', Array, 'vw_general_view', NULL)
#16 /library/XenForo/FrontController.php(176): XenForo_FrontController->renderView(Object(XenForo_ControllerResponse_View), Object(XenForo_ViewRenderer_Raw), Array)
#17 /admin.php(13): XenForo_FrontController->run()
#18 {main}
Request State
array(3) {
["url"] => string(57) "admin.php?wiki/upgrade&progress=1"
["_GET"] => array(3) {
["wiki/upgrade"] => string(0) ""
["progress"] => string(1) "1"
["panel"] => string(7) "install"
}
["_POST"] => array(4) {
["wiki/upgrade"] => string(0) ""
["progress"] => string(1) "1"
["_xfToken"] => string(8) "********"
["panel"] => string(7) "install"
}
}