There are instances wherein a self-managed cluster (a cluster with CAPI components on the workload cluster) needs to be returned to a state where the bootstrap cluster. Some instances includes needing to load a specific image to be used during the provisioning phase.
Given this requirement, first you would have to create a new bootstrap cluster as specified in https://docs.d2iq.com/dkp/latest/pre-provisioned-bootstrap. Additionally you can create a bootstrap cluster and specify to output the kubeconfig to a file by performing
dkp create bootstrap --kubeconfig bootstrap.conf.
From here, use your workload cluster kubeconfig and the dkp move command with the workload cluster kubeconfig as the source and the bootstrap cluster kubeconfig as the destination.
dkp move --from-kubeconfig <workload_cluster>.conf --to-kubeconfig <bootstrap_cluster.conf>