diff --git a/migrations/115_doc_purpose.sql b/migrations/115_doc_purpose.sql
index e7994ba..88cb907 100644
--- a/migrations/115_doc_purpose.sql
+++ b/migrations/115_doc_purpose.sql
@@ -1,10 +1,2 @@
--- 문서 용도 구분: business(업무용) | knowledge(참조용)
-DO $$
-BEGIN
-  IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'document_purpose') THEN
-    CREATE TYPE document_purpose AS ENUM ('business', 'knowledge');
-  END IF;
-  IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name='documents' AND column_name='doc_purpose') THEN
-    ALTER TABLE documents ADD COLUMN doc_purpose document_purpose;
-  END IF;
-END $$;
+-- 문서 용도 enum 타입 생성
+CREATE TYPE document_purpose AS ENUM ('business', 'knowledge');
diff --git a/migrations/116_doc_purpose_column.sql b/migrations/116_doc_purpose_column.sql
new file mode 100644
index 0000000..fc89f63
--- /dev/null
+++ b/migrations/116_doc_purpose_column.sql
@@ -0,0 +1,2 @@
+-- 문서 용도 컬럼 추가: business(업무용) | knowledge(참조용)
+ALTER TABLE documents ADD COLUMN IF NOT EXISTS doc_purpose document_purpose;