diff --git a/config/config.perfect.yaml b/config/config.perfect.yaml
index a833e3c7..84c10cb0 100644
--- a/config/config.perfect.yaml
+++ b/config/config.perfect.yaml
@@ -1,4 +1,3 @@
-# SPDX-FileCopyrightText: : 2017-2023 The PyPSA-Eur Authors
 #
 # SPDX-License-Identifier: CC0-1.0