preview.sh CI job is broken

 00:23
🔎 Validate input files 00:00
🔃 Reusing management cluster 00:00
🔃 Install flux

This show that https://gitlab.com/sylva-projects/sylva-core/blob/587721499c5ab00cc37da10a182ce920505305df/preview.sh#L15 is trying to reuse the mgmt cluster, which shouldn't be the case in this pipeline that is purely standalone and deploys no mgmt cluster.

I suspect that there must be a leftover management-cluster-kubeconfig file from a previous run on the same runner, maybe ?