diff --git a/backend/src/models/document_link.py b/backend/src/models/document_link.py
index b5c3145..f9c8f75 100644
--- a/backend/src/models/document_link.py
+++ b/backend/src/models/document_link.py
@@ -44,9 +44,9 @@ class DocumentLink(Base):
     created_at = Column(DateTime(timezone=True), server_default=func.now())
     updated_at = Column(DateTime(timezone=True), onupdate=func.now())
     
-    # 관계
+    # 관계 - target_document는 외래키 제약 조건이 없으므로 relationship 제거
     source_document = relationship("Document", foreign_keys=[source_document_id], backref="outgoing_links")
-    target_document = relationship("Document", foreign_keys=[target_document_id], backref="incoming_links")
+    # target_document relationship 제거 (노트 ID도 포함할 수 있으므로)
     creator = relationship("User", backref="created_links")
 
     def __repr__(self):