diff --git a/db/migrate/20181030154446_add_missing_indexes_for_foreign_keys.rb b/db/migrate/20181030154446_add_missing_indexes_for_foreign_keys.rb
index 8a639e3275b9a36f7b766830b6c446571d637ab8..176d55565d80787e3abcc9685bec0817f5941836 100644
--- a/db/migrate/20181030154446_add_missing_indexes_for_foreign_keys.rb
+++ b/db/migrate/20181030154446_add_missing_indexes_for_foreign_keys.rb
@@ -16,6 +16,7 @@ class AddMissingIndexesForForeignKeys < ActiveRecord::Migration
     add_concurrent_index(:clusters_applications_ingress, :cluster_id, unique: true)
     add_concurrent_index(:clusters_applications_jupyter, :cluster_id, unique: true)
     add_concurrent_index(:clusters_applications_jupyter, :oauth_application_id)
+    add_concurrent_index(:clusters_applications_knative, :cluster_id, unique: true)
     add_concurrent_index(:clusters_applications_prometheus, :cluster_id, unique: true)
     add_concurrent_index(:fork_network_members, :forked_from_project_id)
     add_concurrent_index(:internal_ids, :namespace_id)
@@ -45,6 +46,7 @@ class AddMissingIndexesForForeignKeys < ActiveRecord::Migration
     remove_concurrent_index(:clusters_applications_ingress, :cluster_id, unique: true)
     remove_concurrent_index(:clusters_applications_jupyter, :cluster_id, unique: true)
     remove_concurrent_index(:clusters_applications_jupyter, :oauth_application_id)
+    remove_concurrent_index(:clusters_applications_knative, :cluster_id, unique: true)
     remove_concurrent_index(:clusters_applications_prometheus, :cluster_id, unique: true)
     remove_concurrent_index(:fork_network_members, :forked_from_project_id)
     remove_concurrent_index(:internal_ids, :namespace_id)
diff --git a/db/schema.rb b/db/schema.rb
index d798a26d49858dd1ac4b7ada5d4d62ac1a419397..8e02f43f702b64aade8b217ed6666e0654034c59 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -687,6 +687,7 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "version", null: false
     t.string "hostname"
     t.text "status_reason"
+    t.index ["cluster_id"], name: "index_clusters_applications_knative_on_cluster_id", unique: true, using: :btree
   end
 
   create_table "clusters_applications_prometheus", force: :cascade do |t|