From dd3a7e8562f9d8a5a360883b969fc2545bf649b1 Mon Sep 17 00:00:00 2001
From: Stefan Schulz <github@rubyfi.de>
Date: Mon, 28 Nov 2022 18:47:13 +0100
Subject: [PATCH] needs_external_needs: Skip setting prefixes if no prefix was
 given (#820)

* Skip setting prefixes if no prefix was given

* Fix formatting issue
---
 sphinx_needs/utils.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sphinx_needs/utils.py b/sphinx_needs/utils.py
index 343444fd1..100acdea5 100644
--- a/sphinx_needs/utils.py
+++ b/sphinx_needs/utils.py
@@ -229,6 +229,9 @@ def import_prefix_link_edit(needs: Dict[str, Any], id_prefix: str, needs_extra_l
     :param needs_extra_links: config var of all supported extra links. Normally coming from env.config.needs_extra_links
     :return:
     """
+    if not id_prefix:
+        return
+
     needs_ids = needs.keys()
 
     for need in needs.values():