diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/kinematics_M.yaml b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/kinematics_M.yaml
deleted file mode 100644
index 9df86c00fb..0000000000
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/kinematics_M.yaml
+++ /dev/null
@@ -1,73 +0,0 @@
-bins:
-- k1:
-    min: null
-    mid: 14.5
-    max: null
-  k2:
-    min: null
-    mid: 210.25
-    max: null
-  k3:
-    min: null
-    mid: 7000.0
-    max: null
-- k1:
-    min: null
-    mid: 19.5
-    max: null
-  k2:
-    min: null
-    mid: 380.25
-    max: null
-  k3:
-    min: null
-    mid: 7000.0
-    max: null
-- k1:
-    min: null
-    mid: 25.0
-    max: null
-  k2:
-    min: null
-    mid: 625.0
-    max: null
-  k3:
-    min: null
-    mid: 7000.0
-    max: null
-- k1:
-    min: null
-    mid: 32.0
-    max: null
-  k2:
-    min: null
-    mid: 1024.0
-    max: null
-  k3:
-    min: null
-    mid: 7000.0
-    max: null
-- k1:
-    min: null
-    mid: 41.0
-    max: null
-  k2:
-    min: null
-    mid: 1681.0
-    max: null
-  k3:
-    min: null
-    mid: 7000.0
-    max: null
-- k1:
-    min: null
-    mid: 56.0
-    max: null
-  k2:
-    min: null
-    mid: 3136.0
-    max: null
-  k3:
-    min: null
-    mid: 7000.0
-    max: null
diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/metadata.yaml b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/metadata.yaml
index 70b4df21d7..3be2658f40 100644
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/metadata.yaml
+++ b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/metadata.yaml
@@ -48,9 +48,5 @@ implemented_observables:
     - - ATLAS_DY_7TEV_LOMASS_EXT
   data_uncertainties:
     - uncertainties.yaml
-  variants:
-    legacy:
-      data_uncertainties:
-      - uncertainties_legacy_M.yaml
   data_central: data.yaml
   ported_from: ATLASLOMASSDY11EXT
diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/uncertainties_legacy_M.yaml b/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/uncertainties_legacy_M.yaml
deleted file mode 100644
index 1069c04153..0000000000
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_Z0_7TEV_LOMASS/uncertainties_legacy_M.yaml
+++ /dev/null
@@ -1,92 +0,0 @@
-definitions:
-  stat:
-    description: Uncorrelated statistical uncertainties
-    treatment: ADD
-    type: UNCORR
-  sys_corr_1:
-    description: 'Sys uncertainty idx: 1'
-    treatment: MULT
-    type: UNCORR
-  sys_corr_2:
-    description: 'Sys uncertainty idx: 2'
-    treatment: MULT
-    type: UNCORR
-  sys_corr_3:
-    description: 'Sys uncertainty idx: 3'
-    treatment: MULT
-    type: CORR
-  sys_corr_4:
-    description: 'Sys uncertainty idx: 4'
-    treatment: MULT
-    type: CORR
-  sys_corr_5:
-    description: 'Sys uncertainty idx: 5'
-    treatment: MULT
-    type: CORR
-  sys_corr_6:
-    description: 'Sys uncertainty idx: 6'
-    treatment: MULT
-    type: CORR
-  sys_corr_7:
-    description: 'Sys uncertainty idx: 7'
-    treatment: MULT
-    type: CORR
-  sys_corr_8:
-    description: 'Sys uncertainty idx: 8'
-    treatment: MULT
-    type: ATLASLUMI11
-bins:
-- stat: 521.22
-  sys_corr_1: 62.05
-  sys_corr_2: 74.46
-  sys_corr_3: 310.25
-  sys_corr_4: 496.4
-  sys_corr_5: 1402.33
-  sys_corr_6: -372.3
-  sys_corr_7: -24.82
-  sys_corr_8: 434.35
-- stat: 699.67
-  sys_corr_1: 67.71
-  sys_corr_2: 67.71
-  sys_corr_3: 315.98
-  sys_corr_4: 835.09
-  sys_corr_5: 2550.41
-  sys_corr_6: -631.96
-  sys_corr_7: 22.57
-  sys_corr_8: 789.95
-- stat: 483.12
-  sys_corr_1: 14.64
-  sys_corr_2: 58.56
-  sys_corr_3: 131.76
-  sys_corr_4: 527.04
-  sys_corr_5: 1244.4
-  sys_corr_6: -263.52
-  sys_corr_7: 0.0
-  sys_corr_8: 512.4
-- stat: 269.2
-  sys_corr_1: 13.46
-  sys_corr_2: 26.92
-  sys_corr_3: 47.11
-  sys_corr_4: 242.28
-  sys_corr_5: 417.26
-  sys_corr_6: -107.68
-  sys_corr_7: -6.73
-  sys_corr_8: 235.55
-- stat: 146.12
-  sys_corr_1: 2.81
-  sys_corr_2: 14.05
-  sys_corr_3: 19.67
-  sys_corr_4: 101.16
-  sys_corr_5: 118.02
-  sys_corr_6: -36.53
-  sys_corr_7: -2.81
-  sys_corr_8: 98.35
-- stat: 59.69
-  sys_corr_1: 1.27
-  sys_corr_2: 6.35
-  sys_corr_3: 7.62
-  sys_corr_4: 45.72
-  sys_corr_5: 45.72
-  sys_corr_6: -8.89
-  sys_corr_7: -0.0
-  sys_corr_8: 44.45