diff --git a/pokedex/data/csv/version_groups.csv b/pokedex/data/csv/version_groups.csv
index b172f40..e47dbdd 100644
--- a/pokedex/data/csv/version_groups.csv
+++ b/pokedex/data/csv/version_groups.csv
@@ -10,5 +10,5 @@ id,generation_id,pokedex_id,order
 9,4,6,11
 10,4,7,12
 11,5,8,13
-12,3,4,7
-13,3,4,8
+12,3,,7
+13,3,,8
diff --git a/pokedex/db/tables.py b/pokedex/db/tables.py
index 7726794..68c56a1 100644
--- a/pokedex/db/tables.py
+++ b/pokedex/db/tables.py
@@ -1591,8 +1591,8 @@ class VersionGroup(TableBase):
         info=dict(description=u"This version group's unique ID."))
     generation_id = Column(Integer, ForeignKey('generations.id'), nullable=False,
         info=dict(description=u"The ID of the generation the games in this group belong to."))
-    pokedex_id = Column(Integer, ForeignKey('pokedexes.id'), nullable=False,
-        info=dict(description=u"The ID of the regional Pokédex used in this version group."))
+    pokedex_id = Column(Integer, ForeignKey('pokedexes.id'), nullable=True,
+        info=dict(description=u"The ID of the regional Pokédex used in this version group.  Null if not applicable."))
     order = Column(Integer, nullable=True,
         info=dict(description=u"Order for sorting. Almost by date of release, except similar versions are grouped together."))