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-rw-r--r--db/migrate/20180228115558_add_index_to_events.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/db/migrate/20180228115558_add_index_to_events.rb b/db/migrate/20180228115558_add_index_to_events.rb
index b12527e..a3f4a4b 100644
--- a/db/migrate/20180228115558_add_index_to_events.rb
+++ b/db/migrate/20180228115558_add_index_to_events.rb
@@ -1,4 +1,4 @@
-class AddIndexToEvents < ActiveRecord::Migration
+class AddIndexToEvents < ActiveRecord::Migration[4.2]
def change
add_index :events, :participant_id, unique: false
add_index :events, :message_id, unique: false