diff --git a/src/Database/Queries.hs b/src/Database/Queries.hs
index d17692d..f687662 100644
--- a/src/Database/Queries.hs
+++ b/src/Database/Queries.hs
@@ -38,11 +38,10 @@ createAppVersion sId VersionInfo{..} = do
         versionInfoVersion
         versionInfoReleaseNotes
 
-createMetric :: MonadIO m => Maybe (Key SApp) -> Maybe (Key Version) -> AppIdentifier -> ReaderT SqlBackend m ()
-createMetric appId versionId event = do
+createMetric :: MonadIO m => Key SApp -> Key Version -> ReaderT SqlBackend m ()
+createMetric appId versionId = do
     time <- liftIO $ getCurrentTime 
     insert_ $ Metric
         time
         appId
         versionId
-        event
diff --git a/src/Handler/Apps.hs b/src/Handler/Apps.hs
index 5bbdd9e..ebe028f 100644
--- a/src/Handler/Apps.hs
+++ b/src/Handler/Apps.hs
@@ -97,7 +97,7 @@ getApp rootDir ext@(Extension appId) = do
                                     av <- runDB $ createAppVersion appKey' versionInfo
                                     pure (appKey', av)
                                 Just v -> pure (appKey', entityKey v)
-                    runDB $ createMetric (Just appKey) (Just versionKey) appId'
+                    runDB $ createMetric appKey versionKey
                     sz <- liftIO $ fileSize <$> getFileStatus filePath
                     addHeader "Content-Length" (show sz)
                     respondSource typePlain $ CB.sourceFile filePath .| awaitForever sendChunkBS
diff --git a/src/Model.hs b/src/Model.hs
index ed2f623..98c2fae 100644
--- a/src/Model.hs
+++ b/src/Model.hs
@@ -30,16 +30,15 @@ Version
     appId SAppId
     number AppVersion
     releaseNotes Text
-    UniqueNumber number
+    UniqueBin appId number
     deriving Eq
     deriving Show
 
 
 Metric
     createdAt UTCTime
-    appId SAppId Maybe default=null
-    version VersionId Maybe default=null
-    event Text
+    appId SAppId
+    version VersionId
     deriving Eq
     deriving Show
 |]
diff --git a/test/Handler/AppSpec.hs b/test/Handler/AppSpec.hs
index e3b6167..b1b1b37 100644
--- a/test/Handler/AppSpec.hs
+++ b/test/Handler/AppSpec.hs
@@ -38,8 +38,9 @@ spec = do
                 setUrl ("/apps/bitcoind.s9pk?spec=0.18.1" :: Text)
             statusIs 200
             apps <- runDBtest $ selectList [SAppAppId ==. "bitcoind"] []
-            metrics <- runDBtest $ selectList [MetricEvent ==. "bitcoind"] []
             assertEq "app should exist" (length apps) 1
+            let app = fromJust $ head apps
+            metrics <- runDBtest $ selectList [MetricAppId ==. entityKey app] []
             assertEq "metric should exist" (length metrics) 1
     describe "GET /apps/:appId with existing version spec for cups" $
         withApp $ it "creates app and metric records" $ do
@@ -48,9 +49,9 @@ spec = do
                 setUrl ("/apps/cups.s9pk?spec=0.2.1" :: Text)
             statusIs 200
             apps <- runDBtest $ selectList [SAppAppId ==. "cups"] []
-            metrics <- runDBtest $ selectList [MetricEvent ==. "cups"] []
             assertEq "app should exist" (length apps) 1
-            assertEq "metric should exist" (length metrics) 1
             let app = fromJust $ head apps
+            metrics <- runDBtest $ selectList [MetricAppId ==. entityKey app] []
+            assertEq "metric should exist" (length metrics) 1
             version <- runDBtest $ selectList [VersionAppId ==. entityKey app] []
             assertEq "version should exist" (length version) 1
\ No newline at end of file