diff --git a/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/filter.py b/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/filter.py
index f7d00a0e76..4e7e98cfbd 100644
--- a/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/filter.py
+++ b/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/filter.py
@@ -14,4 +14,3 @@
 if __name__ == "__main__":
     CMS_WCHARM = Extractor("./metadata.yaml", "WPWM-TOT-UNNORM", mult_factor=1000)
     _, _, _ = CMS_WCHARM.generate_data(variant='default', save_to_yaml=True)
-    _, _, _ = CMS_WCHARM.generate_data(variant='sys_10', save_to_yaml=True)
diff --git a/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/filter_utils.py b/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/filter_utils.py
index 9a4c533c43..f13b7cb6f6 100644
--- a/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/filter_utils.py
+++ b/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/filter_utils.py
@@ -229,13 +229,7 @@ def __build_unc_definitions(self, variant='default'):
         # Add systematic uncertainty
         unc_definitions = unc_definitions | SYS_DEFINITIONS
 
-        if variant == 'sys_10':
-            unc_definitions['uncorr_mc_unc'] = {
-                'description': f'MC uncertainty',
-                'treatment': 'MULT',
-                'type': 'UNCORR',
-            }
-        elif variant != 'default':
+        if variant != 'default':
             raise ValueError(f'The variant {variant} is not implemented yet.')
 
         return unc_definitions
@@ -273,9 +267,6 @@ def generate_data(self, variant='default', save_to_yaml=False, path='./'):
             # Add systematic uncertainties
             unc_dict = unc_dict | tmp
 
-            if variant == 'sys_10':
-                unc_dict['uncorr_mc_unc'] = central_data[data_idx] * 0.01
-
             sys_artificial.append(unc_dict)
 
         if save_to_yaml:
diff --git a/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/metadata.yaml b/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/metadata.yaml
index d64a3c14a9..e28be8bbc5 100644
--- a/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/metadata.yaml
+++ b/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/metadata.yaml
@@ -52,9 +52,6 @@ implemented_observables:
     - - CMS_WCHARM_DIFF_UNNORM_13TEV-CMS_WCHARM_13TEV_WPCB_leptrap
     - - CMS_WCHARM_DIFF_UNNORM_13TEV-CMS_WCHARM_13TEV_WMC_leptrap
   variants:
-    sys_10:
-      data_uncertainties:
-      - uncertainties_WPWM-TOT-UNNORM_sys_10.yaml
     legacy:
       data_uncertainties:
       - uncertainties_legacy_WPWM-TOT-UNNORM.yaml
diff --git a/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/uncertainties_WPWM-TOT-UNNORM_sys_10.yaml b/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/uncertainties_WPWM-TOT-UNNORM_sys_10.yaml
deleted file mode 100644
index 74dd7ceabc..0000000000
--- a/nnpdf_data/nnpdf_data/commondata/CMS_WCHARM_13TEV/uncertainties_WPWM-TOT-UNNORM_sys_10.yaml
+++ /dev/null
@@ -1,137 +0,0 @@
-definitions:
-  stat_uncorr_unc:
-    description: Statistical uncertainty
-    treatment: ADD
-    type: UNCORR
-  corr_lumi_unc:
-    description: Luminosity uncertainty 2.6%
-    treatment: MULT
-    type: CMSLUMI13
-  track_sys_unc:
-    description: Tracking efficiency systematic uncertainty
-    treatment: MULT
-    type: CORR
-  brch_sys_unc:
-    description: Branching fraction systematic uncertainty
-    treatment: MULT
-    type: CORR
-  muons_sys_unc:
-    description: Muon identification systematic uncertainty
-    treatment: MULT
-    type: CORR
-  nsel_sys_unc:
-    description: N_sel determination systematic uncertainty
-    treatment: MULT
-    type: CORR
-  dstar_sys_unc:
-    description: D*(2010)+- systematic uncertainty
-    treatment: MULT
-    type: CORR
-  bkgnorm_sys_unc:
-    description: Background normalization systematic uncertainty
-    treatment: MULT
-    type: CORR
-  ptmiss_sys_unc:
-    description: pT miss systematic uncertainty
-    treatment: MULT
-    type: CORR
-  pileup_sys_unc:
-    description: Pileup systematic uncertainty
-    treatment: MULT
-    type: CORR
-  secvrx_sys_unc:
-    description: PDF systematic uncertainty
-    treatment: MULT
-    type: CORR
-  pdf_sys_unc:
-    description: Fragmentation systematic uncertainty
-    treatment: MULT
-    type: CORR
-  frag_sys_unc:
-    description: MC statistics systematic uncertainty
-    treatment: MULT
-    type: CORR
-  mc_sys_unc:
-    description: Symmetrized systematic uncertainty
-    treatment: MULT
-    type: CORR
-  uncorr_mc_unc:
-    description: MC uncertainty
-    treatment: MULT
-    type: UNCORR
-bins:
-- stat_uncorr_unc: 37170.0
-  corr_lumi_unc: 1.42174837e+04
-  track_sys_unc: 2.3
-  brch_sys_unc: 2.4
-  muons_sys_unc: 1.2
-  nsel_sys_unc: 1.5
-  dstar_sys_unc: 0.5
-  bkgnorm_sys_unc: 0.5
-  ptmiss_sys_unc: 8.12403840e-01
-  pileup_sys_unc: 1.95128163e+00
-  secvrx_sys_unc: 1.55563492e+00
-  pdf_sys_unc: 1.2
-  frag_sys_unc: 3.58434094e+00
-  mc_sys_unc: 3.45651559e+00
-  uncorr_mc_unc: 5.68699350e+03
-- stat_uncorr_unc: 28410.0
-  corr_lumi_unc: 1.16728088e+04
-  track_sys_unc: 2.3
-  brch_sys_unc: 2.4
-  muons_sys_unc: 1.2
-  nsel_sys_unc: 1.5
-  dstar_sys_unc: 0.5
-  bkgnorm_sys_unc: 8.52936105e-01
-  ptmiss_sys_unc: 9.79795897e-01
-  pileup_sys_unc: 4.55521679e-01
-  secvrx_sys_unc: 1.83847763e+00
-  pdf_sys_unc: 1.3
-  frag_sys_unc: 2.83548938e+00
-  mc_sys_unc: 8.20167666e+00
-  uncorr_mc_unc: 4.66912350e+03
-- stat_uncorr_unc: 30210.0
-  corr_lumi_unc: 1.19827362e+04
-  track_sys_unc: 2.3
-  brch_sys_unc: 2.4
-  muons_sys_unc: 1.2
-  nsel_sys_unc: 1.5
-  dstar_sys_unc: 0.5
-  bkgnorm_sys_unc: 1.55804365e+00
-  ptmiss_sys_unc: 1.06770783e+00
-  pileup_sys_unc: 2.95084734e+00
-  secvrx_sys_unc: 1.69705627e+00
-  pdf_sys_unc: 0.9
-  frag_sys_unc: 6.48922183e+00
-  mc_sys_unc: 1.06492958e+01
-  uncorr_mc_unc: 4.79309450e+03
-- stat_uncorr_unc: 27450.0
-  corr_lumi_unc: 9.87899375e+03
-  track_sys_unc: 2.3
-  brch_sys_unc: 2.4
-  muons_sys_unc: 1.2
-  nsel_sys_unc: 1.5
-  dstar_sys_unc: 0.5
-  bkgnorm_sys_unc: 1.14345966e+00
-  ptmiss_sys_unc: 1.05237826e+00
-  pileup_sys_unc: 1.95128163e+00
-  secvrx_sys_unc: 2.12132034e+00
-  pdf_sys_unc: 1.4
-  frag_sys_unc: 3.15713478e+00
-  mc_sys_unc: 7.39104188e+00
-  uncorr_mc_unc: 3.95159750e+03
-- stat_uncorr_unc: 24680.0
-  corr_lumi_unc: 7070.6
-  track_sys_unc: 2.3
-  brch_sys_unc: 2.4
-  muons_sys_unc: 1.2
-  nsel_sys_unc: 1.5
-  dstar_sys_unc: 0.5
-  bkgnorm_sys_unc: 9.11043358e-01
-  ptmiss_sys_unc: 2.25166605e+00
-  pileup_sys_unc: 4.86286952e+00
-  secvrx_sys_unc: 3.81837662e+00
-  pdf_sys_unc: 1.5
-  frag_sys_unc: 1.84119526e+00
-  mc_sys_unc: 1.23307542e+01
-  uncorr_mc_unc: 2.82824000e+03