writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, errInvalidArgument), r.URL)
			return
		}

		poolIndices = append(poolIndices, idx)
	}

	if len(poolIndices) == 0 || !proxyDecommissionRequest(ctx, globalEndpoints[poolIndices[0]].Endpoints[0], w, r) {
		if err := z.Decommission(r.Context(), poolIndices...); err != nil {
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
			return
		}
	}