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="fa fa-warning"></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="fa fa-warning"></i> <strong>Unsupported PostgreSQL version</strong> - Ensure that PostgreSQL version 9.4 or higher 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 %}