diff --git a/troubleshooting/250826_slack_id_column_standardization.md b/troubleshooting/250826_slack_id_column_standardization.md
index fd9b02e..8ef44aa 100644
--- a/troubleshooting/250826_slack_id_column_standardization.md
+++ b/troubleshooting/250826_slack_id_column_standardization.md
@@ -49,8 +49,8 @@ CREATE TABLE user_preferences (
     id SERIAL PRIMARY KEY,
     user_id UUID REFERENCES users(id),
     slack_user_id VARCHAR(100),
-    news_keywords TEXT[],  -- 뉴스 키워드
-    email_filter TEXT[],   -- 이메일 필터
+    news_keywords VARCHAR(128)[],  -- 뉴스 키워드
+    email_filter VARCHAR(128)[],   -- 이메일 필터
     briefing_enabled BOOLEAN DEFAULT true,
     briefing_time TIME DEFAULT '09:00',
     updated_at TIMESTAMP DEFAULT NOW()