Failed to upgrade legacy queries Datasource ${DS_PROMETHEUS} was not found

[Ulrar]

Spegel version

v0.0.27

Kubernetes distribution

Talos 1.8

Kubernetes version

1.31.3

CNI

Flannel

Describe the bug

Hi,

The Grafana Dashboard does not seem to work with recent versions of grafana, I get this when loading it :

Failed to upgrade legacy queries Datasource ${DS_PROMETHEUS} was not found

This is grafana 9.5.3 deployed using kube-prometheus 0.13.0.
I've mounted the configmap in the pod's /grafana-dashboard-definitions as I do for numerous other dashboards, but this one does not load most widgets, and their queries is lost if I try to editing them.