diff --git a/roles/network/tasks/detected_network.yml b/roles/network/tasks/detected_network.yml
index 976e46987..899300d53 100644
--- a/roles/network/tasks/detected_network.yml
+++ b/roles/network/tasks/detected_network.yml
@@ -142,9 +142,10 @@
   register: second_gateway_found
   changed_when: False
 
-- assert:
-    that: second_gateway_found.stdout_lines | length == 1
-    fail_msg: "IIAB currently DOES NOT SUPPORT multiple secondary gateways."
+- name: Fail intentionally and explain, if multiple secondary gateways are detected
+  fail:
+    msg: "IIAB currently DOES NOT SUPPORT multiple secondary gateways: {{ second_gateway_found.stdout }}"
+  when: second_gateway_found.stdout_lines is defined and second_gateway_found.stdout_lines | length > 1
 
 - name: Set exclude_devices if default gateway has been detected for {{ second_gateway_found.stdout }}
   set_fact: