diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_13TEV/metadata.yaml b/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_13TEV/metadata.yaml
index dc48313b27..448347ef89 100644
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_13TEV/metadata.yaml
+++ b/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_13TEV/metadata.yaml
@@ -56,5 +56,6 @@ implemented_observables:
     legacy:
       data_uncertainties:
       - uncertainties_legacy_TCHANNEL-XSEC.yaml
+      data_central: data_legacy_TCHANNEL-XSEC.yaml
   data_central: data_TCHANNEL-XSEC.yaml
   ported_from: ATLAS_SINGLETOP_TCH_R_13TEV
diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_7TEV/metadata.yaml b/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_7TEV/metadata.yaml
index a1d3ee1779..e4d2ff0eb7 100644
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_7TEV/metadata.yaml
+++ b/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_7TEV/metadata.yaml
@@ -65,6 +65,7 @@ implemented_observables:
     legacy:
       data_uncertainties:
       - uncertainties_legacy_TBAR-Y-NORM.yaml
+      data_central: data_legacy_TBAR-Y-NORM.yaml
   data_central: data_TBAR-Y-NORM.yaml
   ported_from: ATLAS_SINGLETOP_TCH_DIFF_7TEV_TBAR_RAP_NORM
 - observable_name: T-Y-NORM
@@ -119,6 +120,7 @@ implemented_observables:
     legacy:
       data_uncertainties:
       - uncertainties_legacy_T-Y-NORM.yaml
+      data_central: data_legacy_T-Y-NORM.yaml
   data_central: data_T-Y-NORM.yaml
   ported_from: ATLAS_SINGLETOP_TCH_DIFF_7TEV_T_RAP_NORM
 - observable_name: TCHANNEL-XSEC
@@ -164,5 +166,6 @@ implemented_observables:
     legacy:
       data_uncertainties:
       - uncertainties_legacy_TCHANNEL-XSEC.yaml
+      data_central: data_legacy_TCHANNEL-XSEC.yaml
   data_central: data_TCHANNEL-XSEC.yaml
   ported_from: ATLAS_SINGLETOP_TCH_R_7TEV
diff --git a/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_8TEV/metadata.yaml b/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_8TEV/metadata.yaml
index 5e9ea26962..93e1b49ec5 100644
--- a/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_8TEV/metadata.yaml
+++ b/nnpdf_data/nnpdf_data/commondata/ATLAS_SINGLETOP_8TEV/metadata.yaml
@@ -65,6 +65,7 @@ implemented_observables:
     legacy:
       data_uncertainties:
       - uncertainties_legacy_TBAR-RAP-NORM.yaml
+      data_central: data_legacy_TBAR-RAP-NORM.yaml
   data_central: data_TBAR-RAP-NORM.yaml
   ported_from: ATLAS_SINGLETOP_TCH_DIFF_8TEV_TBAR_RAP_NORM
 - observable_name: T-RAP-NORM
@@ -119,6 +120,7 @@ implemented_observables:
     legacy:
       data_uncertainties:
       - uncertainties_legacy_T-RAP-NORM.yaml
+      data_central: data_legacy_T-RAP-NORM.yaml
   data_central: data_T-RAP-NORM.yaml
   ported_from: ATLAS_SINGLETOP_TCH_DIFF_8TEV_T_RAP_NORM
 - observable_name: TCHANNEL-XSEC
@@ -164,5 +166,6 @@ implemented_observables:
     legacy:
       data_uncertainties:
       - uncertainties_legacy_TCHANNEL-XSEC.yaml
+      data_central: data_legacy_TCHANNEL-XSEC.yaml
   data_central: data_TCHANNEL-XSEC.yaml
   ported_from: ATLAS_SINGLETOP_TCH_R_8TEV