diff --git a/db/migrate/20201203035119_add_index_to_reactions.rb b/db/migrate/20201203035119_add_index_to_reactions.rb
index 5a7efb902ab..3de2a54648d 100644
--- a/db/migrate/20201203035119_add_index_to_reactions.rb
+++ b/db/migrate/20201203035119_add_index_to_reactions.rb
@@ -2,10 +2,6 @@
 
 class AddIndexToReactions < ActiveRecord::Migration[6.0]
   def change
-    # インデックス名の長さ制限を超えてしまうため短い名前にする
-    add_index :reactions,
-              %i[user_id reactionable_id reactionable_type kind],
-              unique: true,
-              name: 'index_reactions_on_reactionable_u_k'
+    add_index :reactions, [:user_id, :reactionable_id, :reactionable_type, :kind], unique: true, name: 'index_reactions_on_reactionable'
   end
 end
diff --git a/db/migrate/20240321092012_create_movies.rb b/db/migrate/20240321092012_create_movies.rb
index ab915be43a3..5640ff2ce76 100644
--- a/db/migrate/20240321092012_create_movies.rb
+++ b/db/migrate/20240321092012_create_movies.rb
@@ -3,9 +3,7 @@ def change
     create_table :movies do |t|
       t.string :title , null: false
       t.text :description
-      t.string :tag_list
-      t.references :user, foreign_key: true, null: false
-      t.references :practice, foreign_key: true
+      t.references :user, foreign_key: true, null: true
 
       t.timestamps
     end
diff --git a/db/migrate/20250618142946_add_index_on_source_id_to_practices.rb b/db/migrate/20250618142946_add_index_on_source_id_to_practices.rb
new file mode 100644
index 00000000000..973c8fdfdac
--- /dev/null
+++ b/db/migrate/20250618142946_add_index_on_source_id_to_practices.rb
@@ -0,0 +1,5 @@
+class AddIndexOnSourceIdToPractices < ActiveRecord::Migration[6.1]
+  def change
+    add_index :practices, :source_id
+  end
+end
diff --git a/db/migrate/20250618144325_add_foreign_key_to_practices_source_id.rb b/db/migrate/20250618144325_add_foreign_key_to_practices_source_id.rb
new file mode 100644
index 00000000000..0c658a29717
--- /dev/null
+++ b/db/migrate/20250618144325_add_foreign_key_to_practices_source_id.rb
@@ -0,0 +1,5 @@
+class AddForeignKeyToPracticesSourceId < ActiveRecord::Migration[6.1]
+  def change
+    add_foreign_key :practices, :practices, column: :source_id
+  end
+end