diff --git a/crowdsec/tasks/main.yml b/crowdsec/tasks/main.yml
index 9137863..69db02a 100644
--- a/crowdsec/tasks/main.yml
+++ b/crowdsec/tasks/main.yml
@@ -19,6 +19,14 @@
     dest: /etc/apt/keyrings/crowdsec.asc
     mode: "0644"
 
+# A deb822 crowdsec.sources (written by the package or by hand) already
+# defines the repository; a second crowdsec.list makes apt warn about
+# duplicate targets.
+- name: Check for an existing deb822 CrowdSec apt source
+  ansible.builtin.stat:
+    path: /etc/apt/sources.list.d/crowdsec.sources
+  register: crowdsec_sources
+
 - name: Add the CrowdSec apt repository
   ansible.builtin.copy:
     dest: /etc/apt/sources.list.d/crowdsec.list
@@ -28,6 +36,7 @@
       https://packagecloud.io/crowdsec/crowdsec/{{ ansible_distribution | lower }}/
       {{ crowdsec.apt_suite_map[ansible_distribution_release] | default(ansible_distribution_release) }} main
   register: crowdsec_repo
+  when: not crowdsec_sources.stat.exists
 
 # The postinst asks these; without them it registers a local machine for a
 # local LAPI and enrols in the central CAPI.