diff --git a/core/src/main/java/com/jdbernard/wdiwtlt/db/models/MediaFile.java b/core/src/main/java/com/jdbernard/wdiwtlt/db/models/MediaFile.java
index c581f21..8cbe517 100644
--- a/core/src/main/java/com/jdbernard/wdiwtlt/db/models/MediaFile.java
+++ b/core/src/main/java/com/jdbernard/wdiwtlt/db/models/MediaFile.java
@@ -1,6 +1,7 @@
 package com.jdbernard.wdiwtlt.db.models;
 
 import java.util.Date;
+import java.sql.Timestamp;
 
 public class MediaFile extends Model {
     public static final String TAG_INFO = "tag info";
@@ -12,7 +13,7 @@ public class MediaFile extends Model {
     public String filePath;
     public String fileHash;
     public String metaInfoSource = TAG_INFO;
-    public Date dateAdded;
+    public Date dateAdded = new Timestamp(new Date().getTime());
     public String comment;
 
     public String toString() { return name; }
diff --git a/core/src/main/java/com/jdbernard/wdiwtlt/db/models/Playlist.java b/core/src/main/java/com/jdbernard/wdiwtlt/db/models/Playlist.java
index 04f4259..36437ff 100644
--- a/core/src/main/java/com/jdbernard/wdiwtlt/db/models/Playlist.java
+++ b/core/src/main/java/com/jdbernard/wdiwtlt/db/models/Playlist.java
@@ -1,13 +1,15 @@
 package com.jdbernard.wdiwtlt.db.models;
 
+import java.sql.Timestamp;
 import java.util.Date;
 
 public class Playlist extends Model {
     public boolean userCreated;
-    public Date lastUsed;
+    public Timestamp lastUsed = new Timestamp(new Date().getTime());
     public String name;
     public int modCount;
     public int mediaFileCount;
+    public Integer copiedFromId;
 
     public String toString() { return name; }
 }
diff --git a/core/src/main/sql/migrations/20151209054632-initial-schema-up.sql b/core/src/main/sql/migrations/20151209054632-initial-schema-up.sql
index f30e6c2..203c25f 100644
--- a/core/src/main/sql/migrations/20151209054632-initial-schema-up.sql
+++ b/core/src/main/sql/migrations/20151209054632-initial-schema-up.sql
@@ -51,7 +51,8 @@ CREATE TABLE playlists (
   last_used TIMESTAMP NOT NULL DEFAULT NOW(),
   name VARCHAR NOT NULL,
   mod_count INTEGER NOT NULL DEFAULT 0,
-  media_file_count INTEGER NOT NULL DEFAULT 0
+  media_file_count INTEGER NOT NULL DEFAULT 0,
+  copied_from_id INTEGER REFERENCES playlists(id)
 );
 
 CREATE TABLE playlists_media_files (