Grafana fails to parse dashboard when all panels are enclosed in a row

[arturo-seijas]

Bug Description

Grafana fails to parse dashboard when all panels are enclosed in a row. Relevant log output is provided.

To Reproduce

Deploy COS

• juju deploy discourse-k8s --channel edge
• juju relate discourse-k8s admin/[cos-model].grafana-dashboards

Environment

Not relevant

Relevant log output

unit-grafana-0: 11:29:50 ERROR unit.grafana/0.juju-log grafana-dashboard:24: Uncaught exception while in charm code:
Traceback (most recent call last):
  File "./src/charm.py", line 1167, in <module>
    main(GrafanaCharm, use_juju_for_storage=True)
  File "/var/lib/juju/agents/unit-grafana-0/charm/venv/ops/main.py", line 438, in main
    _emit_charm_event(charm, dispatcher.event_name)
  File "/var/lib/juju/agents/unit-grafana-0/charm/venv/ops/main.py", line 150, in _emit_charm_event
    event_to_emit.emit(*args, **kwargs)
  File "/var/lib/juju/agents/unit-grafana-0/charm/venv/ops/framework.py", line 355, in emit
    framework._emit(event)  # noqa
  File "/var/lib/juju/agents/unit-grafana-0/charm/venv/ops/framework.py", line 856, in _emit
    self._reemit(event_path)
  File "/var/lib/juju/agents/unit-grafana-0/charm/venv/ops/framework.py", line 931, in _reemit
    custom_handler(event)
  File "/var/lib/juju/agents/unit-grafana-0/charm/lib/charms/grafana_k8s/v0/grafana_dashboard.py", line 1272, in _on_grafana_dashboard_relation_changed
    changes = self._render_dashboards_and_signal_changed(event.relation)
  File "/var/lib/juju/agents/unit-grafana-0/charm/lib/charms/grafana_k8s/v0/grafana_dashboard.py", line 1369, in _render_dashboards_and_signal_changed
    content = _convert_dashboard_fields(content, inject_dropdowns)
  File "/var/lib/juju/agents/unit-grafana-0/charm/lib/charms/grafana_k8s/v0/grafana_dashboard.py", line 599, in _convert_dashboard_fields
    dict_content = _replace_template_fields(dict_content, datasources, existing_templates)
  File "/var/lib/juju/agents/unit-grafana-0/charm/lib/charms/grafana_k8s/v0/grafana_dashboard.py", line 616, in _replace_template_fields
    panels = dict_content["panels"]
KeyError: 'panels'

Additional context

No response