diff --git a/.github/workflows/upstream-sync.yml b/.github/workflows/upstream-sync.yml
index 2679d96f014..76f5e281115 100644
--- a/.github/workflows/upstream-sync.yml
+++ b/.github/workflows/upstream-sync.yml
@@ -28,11 +28,6 @@ jobs:
     uses: stackhpc/.github/.github/workflows/upstream-sync.yml@main
     with:
       release_series: 2026.1
-  synchronise-wallaby:
-    name: Synchronise wallaby
-    uses: stackhpc/.github/.github/workflows/upstream-sync.yml@main
-    with:
-      release_series: wallaby
   synchronise-yoga:
     name: Synchronise yoga
     uses: stackhpc/.github/.github/workflows/upstream-sync.yml@main