diff --git a/app/Logic/PasswordSettingManager.php b/app/Logic/PasswordSettingManager.php
index 1520b8b..6c929b4 100644
--- a/app/Logic/PasswordSettingManager.php
+++ b/app/Logic/PasswordSettingManager.php
@@ -18,7 +18,7 @@ class PasswordSettingManager
     public function generate(User $user)
     {
         // トークン生成
-        $model = new PasswordSettingToken();
+        $model = PasswordSettingToken::whereUserId($user->id)->firstOrNew();
         $model->user_id = $user->id;
         $model->token = Str::uuid();
         $model->expires_at = DateUtil::now()->addHours(24);