netbox/netbox/templates/users/inc/v1_token_warning.html

{% load i18n %}
<div id="v1-deprecation-warning" class="alert alert-warning bg-warning-subtle mx-3 my-2" role="alert" style="display: none;">
  <div class="d-flex">
    <div>
      <i class="mdi mdi-alert p-2"></i>
    </div>
    <div>
      <h4 class="alert-title">{% trans "v1 API Tokens Are Deprecated" %}</h4>
      <div class="text-secondary">
        {% blocktrans trimmed %}
          v1 API tokens are deprecated and will be removed in a future NetBox release.
          Please use v2 tokens instead.
        {% endblocktrans %}
      </div>
    </div>
  </div>
</div>