I am getting lots of errors similar to:

error syncing 'cluster-fleet-default-c-ng4xb-8136efa3963d': handler namespace-auth: failed to add namespace cluster-fleet-default-c-ng4xb-8136efa3963d to system project: cluster [local] contains more than 1 [System] project, requeuing

in my console. How can i delete the duplicated System project?