diff --git a/db/migrate/20150324155957_set_incorrect_assignee_id_to_null.rb b/db/migrate/20150324155957_set_incorrect_assignee_id_to_null.rb
new file mode 100644
index 0000000000000000000000000000000000000000..42dc8173e46ee315b46d68c8a2ed3a040427956e
--- /dev/null
+++ b/db/migrate/20150324155957_set_incorrect_assignee_id_to_null.rb
@@ -0,0 +1,6 @@
+class SetIncorrectAssigneeIdToNull < ActiveRecord::Migration
+  def up
+    execute "UPDATE issues SET assignee_id = NULL WHERE assignee_id = -1"
+    execute "UPDATE merge_requests SET assignee_id = NULL WHERE assignee_id = -1"
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index e1a5b70532a7435a6c2e7d8c276e62a7639e45c3..4a445ae583200846670374ab97a2e2a397929305 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150320234437) do
+ActiveRecord::Schema.define(version: 20150324155957) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"