diff --git a/aleksis/apps/abi/models.py b/aleksis/apps/abi/models.py
index 1fc1b932b11ad374e1b503ed3d23350e20d67139..6cd60dc07caf320dd1b9ec1f39fd6545749f09f4 100644
--- a/aleksis/apps/abi/models.py
+++ b/aleksis/apps/abi/models.py
@@ -184,7 +184,7 @@ class RankingCategory(ExtensibleModel):
 
     @property
     def field_name(self):
-        return "ranking_" + slugify(self.name).replace("-", "_")
+        return "ranking_" + slugify(self.name).replace("-", "_") + "_" + str(self.group.pk)
 
     class Meta:
         verbose_name = _("Ranking category")