diff --git a/jenkins-scripts/dsl/gz-collections.yaml b/jenkins-scripts/dsl/gz-collections.yaml
index 3dc9dc5fc..1958610d9 100644
--- a/jenkins-scripts/dsl/gz-collections.yaml
+++ b/jenkins-scripts/dsl/gz-collections.yaml
@@ -256,7 +256,7 @@ collections:
           current_branch: main
     ci:
       configs:
-        - focal
+        - focal_exclude_harmonic_abi_dups
         - brew
         - win
     packaging:
@@ -345,7 +345,7 @@ collections:
         - jammy
       linux:
         ignore_major_version:
-          - gz-harmonic     
+          - gz-harmonic
   - name: 'ionic'
     libs:
       - name: gz-cmake
@@ -472,6 +472,43 @@ ci_configs:
       - pr_abichecker
       - stable_branches
       - stable_branches_asan
+  - name: focal_exclude_harmonic_abi_dups
+    system:
+      so: linux
+      distribution: ubuntu
+      version: focal
+      arch: amd64
+    requirements:
+      large_memory:
+        - gz-physics
+      nvidia_gpu:
+        - gz-sim
+        - gz-gui
+        - gz-rendering
+        - gz-sensors
+    exclude:
+      all:
+        - gz-citadel
+        - gz-fortress
+        - gz-garden
+      abichecker:
+        - gz-cmake
+        - gz-tools
+        # Exclude the abichecker that are duplicate with Harmonic
+        # The ones on Harmonic run on jammy
+        - gz-common
+        - gz-math
+        - gz-plugin
+        - gz-utils
+    pre_setup_script_hook:
+      gz-physics:
+        - "export MAKE_JOBS=1"
+    tests_disabled:
+    ci_categories_enabled:
+      - pr
+      - pr_abichecker
+      - stable_branches
+      - stable_branches_asan
   - name: jammy
     system:
       so: linux