correct link to announcement
<td>{{ announcement.author }}</td>
<td>{{ announcement.active }}</td>
<td>{{ announcement.active_until }}</td>
- <td class="button-cell"><a href="{% url 'control.announcements.detail' announcement=user.pk %}">{% trans 'Edit' %}</a></td>
+ <td class="button-cell"><a href="{% url 'control.announcements.detail' announcement=announcement.pk %}">{% trans 'Edit' %}</a></td>
</tr>
{% endfor %}
</table>
