diff --git a/ironic_inspector/db.py b/ironic_inspector/db.py
index 7d7a11111..73e67e76e 100644
--- a/ironic_inspector/db.py
+++ b/ironic_inspector/db.py
@@ -137,7 +137,7 @@ class RuleAction(Base):
 class IntrospectionData(Base):
     __tablename__ = 'introspection_data'
     uuid = Column(String(36), ForeignKey('nodes.uuid'), primary_key=True)
-    processed = Column(Boolean, default=False)
+    processed = Column(Boolean, default=False, primary_key=True)
     data = Column(db_types.JsonEncodedDict(mysql_as_long=True),
                   nullable=True)
 
diff --git a/ironic_inspector/migrations/versions/bf8dec16023c_add_introspection_data_table.py b/ironic_inspector/migrations/versions/bf8dec16023c_add_introspection_data_table.py
index bceefac29..a43763670 100644
--- a/ironic_inspector/migrations/versions/bf8dec16023c_add_introspection_data_table.py
+++ b/ironic_inspector/migrations/versions/bf8dec16023c_add_introspection_data_table.py
@@ -34,7 +34,7 @@ def upgrade():
         'introspection_data',
         sa.Column('uuid', sa.String(36), sa.ForeignKey('nodes.uuid'),
                   primary_key=True),
-        sa.Column('processed', sa.Boolean, default=False),
+        sa.Column('processed', sa.Boolean, default=False, primary_key=True),
         sa.Column('data', db_types.JsonEncodedDict(mysql_as_long=True).impl,
                   nullable=True),
         mysql_ENGINE='InnoDB',
diff --git a/ironic_inspector/test/unit/test_node_cache.py b/ironic_inspector/test/unit/test_node_cache.py
index 4e6bed5a1..477bf5145 100644
--- a/ironic_inspector/test/unit/test_node_cache.py
+++ b/ironic_inspector/test/unit/test_node_cache.py
@@ -1285,3 +1285,22 @@ class TestIntrospectionDataDbStore(test_base.NodeTest):
     def test_get_no_data_available(self):
         self.assertRaises(utils.IntrospectionDataNotFound,
                           node_cache.get_introspection_data, self.node.uuid)
+
+    def test_store_proc_and_unproc(self):
+        unproc_data = {'s': 'value', 'b': True, 'i': 42}
+        node_cache.store_introspection_data(self.node.uuid,
+                                            unproc_data,
+                                            processed=False)
+
+        proc_data = {'foo': 'bar'}
+        node_cache.store_introspection_data(self.node.uuid,
+                                            proc_data,
+                                            processed=True)
+
+        stored_data = node_cache.get_introspection_data(self.node.uuid,
+                                                        True)
+        self.assertEqual(stored_data, proc_data)
+
+        stored_data = node_cache.get_introspection_data(self.node.uuid,
+                                                        False)
+        self.assertEqual(stored_data, unproc_data)