diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index fcd1bcb..bb9acef 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -7,6 +7,10 @@ on:
   schedule:
     - cron: "17 3 * * 1"
 
+concurrency:
+  group: mobilityops-ci-${{ gitea.repository }}-${{ gitea.ref }}
+  cancel-in-progress: true
+
 jobs:
   backend:
     runs-on: ubuntu-latest
diff --git a/.gitea/workflows/managed-validation.yml b/.gitea/workflows/managed-validation.yml
index 05072fe..3ee15ba 100644
--- a/.gitea/workflows/managed-validation.yml
+++ b/.gitea/workflows/managed-validation.yml
@@ -1,7 +1,6 @@
 name: Managed validation
 
 on:
-  pull_request:
   workflow_dispatch:
     inputs:
       profile: