diff --git a/src/main/java/com/mediamanager/model/TrackHasGenre.java b/src/main/java/com/mediamanager/model/TrackHasGenre.java
index e2e6717..408dffb 100644
--- a/src/main/java/com/mediamanager/model/TrackHasGenre.java
+++ b/src/main/java/com/mediamanager/model/TrackHasGenre.java
@@ -3,7 +3,8 @@ package com.mediamanager.model;
 import jakarta.persistence.*;
 
 @Entity
-@Table(name = "trackhasgenre")
+@Table(name = "trackhasgenre", 
+    uniqueConstraints = @UniqueConstraint(columnNames = {"fk_track_id", "fk_genre_id"}))
 public class TrackHasGenre {
 
     @Id