netbox-community-netbox/netbox/templates/exceptions/programming_error.html

{% extends '500.html' %}

{% block message %}
  <p>
    A database programming error was detected while processing this request. Common causes include the following:
  </p>
  <p>
    <i class="mdi mdi-alert"></i> <strong>Database migrations missing</strong> - When upgrading to a new NetBox release,
    the upgrade script must be run to apply any new database migrations. You can run migrations manually by executing
    <code>python3 manage.py migrate</code> from the command line.
  </p>
  <p>
    <i class="mdi mdi-alert"></i> <strong>Unsupported PostgreSQL version</strong> - Ensure that PostgreSQL version 10
    or later is in use. You can check this by connecting to the database using NetBox's credentials and issuing a query
    for <code>SELECT VERSION()</code>.
  </p>
{% endblock message %}