diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/filter.py b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/filter.py
index 24c5f65611..6d71a56947 100644
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/filter.py
+++ b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/filter.py
@@ -54,8 +54,8 @@ def filter_ATLAS_Z0_8TEV_HIMASS_systematics():
             }
 
         elif sys[0]['name'] == 'sys,lumi':
-            error_definitions[sys[0]['name']] = {
-                "description": f"{sys[0]['name']}",
+            error_definitions["ATLASLUMI12"] = {
+                "description": f"ATLASLUMI12",
                 "treatment": "MULT",
                 "type": "SPECIAL",
             }
diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/metadata.yaml b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/metadata.yaml
index 586fda0c68..a631b7260f 100644
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/metadata.yaml
+++ b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/metadata.yaml
@@ -36,15 +36,15 @@ implemented_observables:
   - sqrts
   kinematics:
     variables:
-      k1:
+      y:
         description: Absolute rapidity of the dilepton system
         label: y
         units: ''
-      k2:
+      M2:
         description: Invariant mass of the dilepton system
         label: M2
         units: ''
-      k3:
+      sqrts:
         description: Center of mass energy
         label: sqrts
         units: ''
diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/uncertainties.yaml b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/uncertainties.yaml
index 14e5a70340..14129f8c8e 100644
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/uncertainties.yaml
+++ b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_8TEV_HIMASS/uncertainties.yaml
@@ -147,8 +147,8 @@ definitions:
     description: sys,cor35
     treatment: MULT
     type: CORR
-  sys,lumi:
-    description: sys,lumi
+  ATLASLUMI12:
+    description: ATLASLUMI12
     treatment: MULT
     type: SPECIAL
 bins: