return
	}

	if err = cfg.DelFrom(bytes.NewReader(kvBytes)); err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	if err = validateConfig(ctx, cfg, subSys); err != nil {
		writeCustomErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigBadJSON), err.Error(), r.URL)
		return
	}

	if config.LambdaSubSystems.Contains(subSys) {
		if err := lambda.TestSubSysLambdaTargets(GlobalContext, s, subSys, NewHTTPTransport()); err != nil {
			return err
		}
	}

	return nil
}

func validateConfig(ctx context.Context, s config.Config, subSys string) error {
	objAPI := newObjectLayerFn()

	// We must have a global lock for this so nobody else modifies env while we do.
	defer env.LockSetEnv()()