Error !

GlogEngineNotExistsRecordError: Row with key 'karon1996' isn't in table 'Users'

<section> <header class="my-styleable"> % if glog.owner[0] != owner: <span class="ico ver44" title="Repost - create by ${glog.owner[0]['nickname']}"></span> % endif <div class="owerhide"><h2>${glog['title']}</h2></div> <p> <span>Last updated: <span class="timeago" data-timestamp-rfc2822="${dt.strftime('%a %b %d %Y %H:%M:%S %z')}" title="${dt.strftime('%x')}">${dt.strftime('%x')}</span></span>
/var/www/g-com/live/src/../glogengine/nosql/lazy_dict.py, line 288:
(to_unicode(pk), self._cf.column_family)
/var/www/g-com/live/src/../glogengine/nosql/mutated_dict.py, line 139:
column_count=column_count)
/var/www/g-com/live/src/../glogengine/nosql/mutated_dict.py, line 246:
self.load()
/var/www/g-com/live/src/../glogengine/nosql/entity.py, line 213:
return self.data[attr]
/var/www/g-com/live/src/../glogengine/user/base.py, line 69:
return super(BaseUser, self).__getitem__(attr)
/var/www/g-com/live/src/templates/widget/my-glogster/template/vertical-page.tpl, line 25:
<span class="ico ver44" title="Repost - create by ${glog.owner[0]['nickname']}"></span>
/var/www/g-com/lib/python2.6/site-packages/mako/runtime.py, line 734:
callable_(ctx, **_kwargs_for_include(callable_, context._data, **kwargs))
/var/www/g-com/live/src/templates/widget/my-glogster/template/vertical.tpl, line 8:
<%include file="/widget/my-glogster/template/vertical-page.tpl" />
/var/www/g-com/lib/python2.6/site-packages/mako/runtime.py, line 734:
callable_(ctx, **_kwargs_for_include(callable_, context._data, **kwargs))
/var/www/g-com/live/src/templates/page/profile.tpl, line 104:
<%include file="/widget/my-glogster/template/vertical.tpl"/>
/var/www/g-com/lib/python2.6/site-packages/mako/runtime.py, line 865:
callable_(context, *args, **kwargs)
/var/www/g-com/lib/python2.6/site-packages/mako/runtime.py, line 839:
_exec_template(inherit, lclcontext, args=args, kwargs=kwargs)
/var/www/g-com/lib/python2.6/site-packages/mako/runtime.py, line 807:
**_kwargs_for_callable(callable_, data))
/var/www/g-com/lib/python2.6/site-packages/mako/template.py, line 452:
as_unicode=True)
/var/www/g-com/live/src/lib/common/helpers.py, line 56:
response = template.render_unicode(**out_context)
/var/www/g-com/live/src/controllers/page.py, line 187:
return render(self.template, context)
/var/www/g-com/live/src/controllers/page.py, line 202:
self.render_main_block(*args, **kwargs) +