diff --git a/ckan/lib/dictization/model_dictize.py b/ckan/lib/dictization/model_dictize.py
index 0315eada73d..f7a1e145f08 100644
--- a/ckan/lib/dictization/model_dictize.py
+++ b/ckan/lib/dictization/model_dictize.py
@@ -228,7 +228,7 @@ def package_dictize(pkg, context):
     #extras - no longer revisioned, so always provide latest
     extra = model.package_extra_table
     q = select([extra]).where(extra.c.package_id == pkg.id)
-    result = execute(q, extra, context)
+    result = _execute(q, extra, context)
     result_dict["extras"] = extras_list_dictize(result, context)
 
     #groups
diff --git a/ckan/migration/versions/088_delete_extras_which_are_deleted_state.py b/ckan/migration/versions/088_delete_extras_which_are_deleted_state.py
index 99b08c6bba7..fe10df86cd9 100644
--- a/ckan/migration/versions/088_delete_extras_which_are_deleted_state.py
+++ b/ckan/migration/versions/088_delete_extras_which_are_deleted_state.py
@@ -6,6 +6,9 @@ def upgrade(migrate_engine):
         '''
             ALTER TABLE "package_extra_revision"
               DROP CONSTRAINT package_extra_revision_continuity_id_fkey;
+            ALTER TABLE "group_extra_revision"
+              DROP CONSTRAINT group_extra_revision_continuity_id_fkey;
             DELETE FROM "package_extra" WHERE state='deleted';
+            DELETE FROM "group_extra" WHERE state='deleted';
         '''
     )
diff --git a/ckan/model/__init__.py b/ckan/model/__init__.py
index 280bb342dd5..c00755c0b65 100644
--- a/ckan/model/__init__.py
+++ b/ckan/model/__init__.py
@@ -60,7 +60,6 @@
 from group_extra import (
     GroupExtra,
     group_extra_table,
-    GroupExtraRevision,
 )
 from package_extra import (
     PackageExtra,
diff --git a/ckan/model/group.py b/ckan/model/group.py
index a27a00e1503..ee82c0d03dc 100644
--- a/ckan/model/group.py
+++ b/ckan/model/group.py
@@ -357,12 +357,11 @@ def all_related_revisions(self):
         this group. Ordered by most recent first.
         '''
         results = {}
-        from group_extra import GroupExtra
         for grp_rev in self.all_revisions:
             if not grp_rev.revision in results:
                 results[grp_rev.revision] = []
             results[grp_rev.revision].append(grp_rev)
-        for class_ in [Member, GroupExtra]:
+        for class_ in [Member]:  # GroupExtra is not revisioned any more
             rev_class = class_.__revision_class__
             obj_revisions = meta.Session.query(rev_class).\
                 filter_by(group_id=self.id).all()
diff --git a/ckan/model/group_extra.py b/ckan/model/group_extra.py
index fd4fb9ba6ea..3d3fa4612b4 100644
--- a/ckan/model/group_extra.py
+++ b/ckan/model/group_extra.py
@@ -2,6 +2,7 @@
 
 import vdm.sqlalchemy
 from sqlalchemy import orm, types, Column, Table, ForeignKey
+from sqlalchemy.ext.associationproxy import association_proxy
 from six import text_type
 
 import group
@@ -11,7 +12,7 @@
 import domain_object
 
 
-__all__ = ['GroupExtra', 'group_extra_table', 'GroupExtraRevision']
+__all__ = ['GroupExtra', 'group_extra_table']
 
 group_extra_table = Table('group_extra', meta.metadata,
     Column('id', types.UnicodeText, primary_key=True, default=_types.make_uuid),
@@ -21,11 +22,13 @@
     Column('state', types.UnicodeText, default=core.State.ACTIVE),
 )
 
-group_extra_revision_table = core.make_revisioned_table(group_extra_table)
+# Define the group_extra_revision table, but no need to map it, as it is only
+# used by migrate_package_activity.py
+group_extra_revision_table = \
+    core.make_revisioned_table(group_extra_table, frozen=True)
 
 
-class GroupExtra(vdm.sqlalchemy.RevisionedObjectMixin,
-                 core.StatefulObjectMixin,
+class GroupExtra(core.StatefulObjectMixin,
                  domain_object.DomainObject):
     pass
 
@@ -38,18 +41,10 @@ class GroupExtra(vdm.sqlalchemy.RevisionedObjectMixin,
         )
     },
     order_by=[group_extra_table.c.group_id, group_extra_table.c.key],
-    extension=[vdm.sqlalchemy.Revisioner(group_extra_revision_table),],
 )
 
-vdm.sqlalchemy.modify_base_object_mapper(GroupExtra, core.Revision, core.State)
-GroupExtraRevision = vdm.sqlalchemy.create_object_version(meta.mapper, GroupExtra,
-    group_extra_revision_table)
-
 def _create_extra(key, value):
     return GroupExtra(key=text_type(key), value=value)
 
-_extras_active = vdm.sqlalchemy.stateful.DeferredProperty('_extras',
-        vdm.sqlalchemy.stateful.StatefulDict, base_modifier=lambda x: x.get_as_of())
-setattr(group.Group, 'extras_active', _extras_active)
-group.Group.extras = vdm.sqlalchemy.stateful.OurAssociationProxy('extras_active', 'value',
-            creator=_create_extra)
+group.Group.extras = association_proxy(
+    '_extras', 'value', creator=_create_extra)
diff --git a/ckan/model/revision.py b/ckan/model/revision.py
index 8e989ecc654..7ebd56f64d2 100644
--- a/ckan/model/revision.py
+++ b/ckan/model/revision.py
@@ -15,9 +15,9 @@ def make_revisioned_table(base_table, frozen=False):
     @return revision table.
     '''
     base_table.append_column(
-            Column('revision_id', UnicodeText, ForeignKey('revision.id'))
+            Column(u'revision_id', UnicodeText, ForeignKey(u'revision.id'))
             )
-    newtable = Table(base_table.name + '_revision', base_table.metadata)
+    newtable = Table(base_table.name + u'_revision', base_table.metadata)
     copy_table(base_table, newtable)
 
     # create foreign key 'continuity' constraint
@@ -28,17 +28,17 @@ def make_revisioned_table(base_table, frozen=False):
         if col.primary_key:
             pkcols.append(col)
     assert len(pkcols) <= 1,\
-        'Do not support versioning objects with multiple primary keys'
-    fk_name = base_table.name + '.' + pkcols[0].name
+        u'Do not support versioning objects with multiple primary keys'
+    fk_name = base_table.name + u'.' + pkcols[0].name
     newtable.append_column(
-        Column('continuity_id', pkcols[0].type,
+        Column(u'continuity_id', pkcols[0].type,
                None if frozen else ForeignKey(fk_name))
         )
 
     # TODO: why do we iterate all the way through rather than just using dict
     # functionality ...? Surely we always have a revision here ...
     for col in newtable.c:
-        if col.name == 'revision_id':
+        if col.name == u'revision_id':
             col.primary_key = True
             newtable.primary_key.columns.add(col)
     return newtable
diff --git a/ckan/tests/legacy/lib/test_dictization.py b/ckan/tests/legacy/lib/test_dictization.py
index 21387459861..96bfbe5dba9 100644
--- a/ckan/tests/legacy/lib/test_dictization.py
+++ b/ckan/tests/legacy/lib/test_dictization.py
@@ -41,11 +41,11 @@ def setup_class(cls):
             u'author_email': None,
             u'creator_user_id': None,
             'extras': [
-            # extras are no longer revisioned
-            #    {u'key': u'genre',
-            #     u'state': u'active',
-            #     u'value': 'romantic novel'},
-            #    {u'key': u'original media', u'state': u'active', u'value': u'book'}
+                # extras are no longer revisioned so we get the latest version
+                {'key': u'david', 'state': u'active', 'value': u'new_value'},
+                {'key': u'genre', 'state': u'active', 'value': u'new_value'},
+                {'key': u'original media', 'state': u'active',
+                 'value': u'book'}
                ],
             'groups': [{
                         u'name': u'david',
@@ -441,7 +441,6 @@ def test_13_get_package_in_past(self):
 
         third_dictized['tags'].insert(1, {'name': u'newnew_tag', 'display_name': u'newnew_tag', 'state': 'active'})
         third_dictized['num_tags'] = third_dictized['num_tags'] + 1
-        third_dictized['extras'] = []  # extras are no longer revisioned
         third_dictized['state'] = 'active'
         third_dictized['state'] = 'active'
 
diff --git a/ckan/tests/logic/action/test_delete.py b/ckan/tests/logic/action/test_delete.py
index 1fced4211de..a4daac6fd3a 100644
--- a/ckan/tests/logic/action/test_delete.py
+++ b/ckan/tests/logic/action/test_delete.py
@@ -242,8 +242,7 @@ def test_purged_group_leaves_no_trace_in_the_model(self):
         assert_equals(sorted(
             [gr.name for gr in model.Session.query(model.GroupRevision)]),
             ['child', 'parent'])
-        assert_equals(model.Session.query(model.GroupExtraRevision).all(),
-                      [])
+        # GroupExtra is not revisioned
         # Member is not revisioned
 
         # No Revision objects were purged, in fact 1 is created for the purge
@@ -345,8 +344,7 @@ def test_purged_organization_leaves_no_trace_in_the_model(self):
         assert_equals(sorted(
             [gr.name for gr in model.Session.query(model.GroupRevision)]),
             ['child', 'parent'])
-        assert_equals(model.Session.query(model.GroupExtraRevision).all(),
-                      [])
+        # GroupExtra is not revisioned
         # Member is not revisioned
 
         # No Revision objects were purged, in fact 1 is created for the purge