Server Error when set Private Node

I got an error when try set a note to private.

Server Error

Mysqli statement execute error : Lock wait timeout exceeded; try restarting transaction

Zend_Db_Statement_Mysqli->_execute() in Zend/Db/Statement.php at line 297
Zend_Db_Statement->execute() in Zend/Db/Adapter/Abstract.php at line 479
Zend_Db_Adapter_Abstract->query() in Zend/Db/Adapter/Abstract.php at line 574
Zend_Db_Adapter_Abstract->insert() in XenForo/DataWriter.php at line 1500
XenForo_DataWriter->_insert() in XenForo/DataWriter.php at line 1489
XenForo_DataWriter->_save() in XenForo/DataWriter.php at line 1291
XenForo_DataWriter->save() in XenForo/Model/Permission.php at line 1140
XenForo_Model_Permission->_updatePermissionsForUserCollection() in XenForo/Model/Permission.php at line 1061
XenForo_Model_Permission->updateContentPermissionsForUserCollection() in XenForo/ControllerAdmin/Permission/Node.php at line 268
XenForo_ControllerAdmin_Permission_Node->_setPermissionRevokeStatus() in XenForo/ControllerAdmin/Permission/Node.php at line 87
XenForo_ControllerAdmin_Permission_Node->actionNodeWideRevoke() in XenForo/FrontController.php at line 310
XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
XenForo_FrontController->run() in /var/www/vhosts/***/httpdocs/admin.php at line 13


XenForo developer
Staff member
Does it happen consistently? That could happen if there was another request going at the same time and it took too long (example being clicking the submit button multiple times).