src/main/java/com/mediamanager/model/TrackHasArtist.java

@@ -3,10 +3,7 @@ package com.mediamanager.model;
 import jakarta.persistence.*;
 
 @Entity
-@Table(
-    name = "trackhasartist",
-    uniqueConstraints = @UniqueConstraint(columnNames = {"fk_track_id", "fk_artist_id"})
-)
+@Table(name = "trackhasartist")
 public class TrackHasArtist {
 
     @Id

src/main/java/com/mediamanager/model/TrackHasComposer.java

@@ -3,10 +3,7 @@ package com.mediamanager.model;
 import jakarta.persistence.*;
 
 @Entity
-@Table(
-    name = "trackhascomposer",
-    uniqueConstraints = @UniqueConstraint(columnNames = {"fk_track_id", "fk_composer_id"})
-)
+@Table(name = "trackhascomposer")
 public class TrackHasComposer {
 
     @Id

src/main/java/com/mediamanager/model/TrackHasGenre.java

@@ -3,8 +3,7 @@ package com.mediamanager.model;
 import jakarta.persistence.*;
 
 @Entity
-@Table(name = "trackhasgenre", 
-    uniqueConstraints = @UniqueConstraint(columnNames = {"fk_track_id", "fk_genre_id"}))
+@Table(name = "trackhasgenre")
 public class TrackHasGenre {
 
     @Id

src/main/java/com/mediamanager/service/delegate/handler/trackhasartist/DeleteTrackHasArtistHandler.java

@@ -59,4 +59,4 @@ public class DeleteTrackHasArtistHandler implements ActionHandler {
                     .setPayload(deleteResponse.toByteString());
         }
     }
-}
+    }

src/main/java/com/mediamanager/service/delegate/handler/trackhascomposer/DeleteTrackHasComposerHandler.java

@@ -59,4 +59,4 @@ public class DeleteTrackHasComposerHandler implements ActionHandler {
                     .setPayload(deleteResponse.toByteString());
         }
     }
-}
+    }

src/main/java/com/mediamanager/service/delegate/handler/trackhasgenre/DeleteTrackHasGenreHandler.java

@@ -59,4 +59,4 @@ public class DeleteTrackHasGenreHandler implements ActionHandler {
                     .setPayload(deleteResponse.toByteString());
         }
     }
-}
+    }

src/main/java/com/mediamanager/service/delegate/handler/trackhasgenre/GetTrackHasGenreByIdHandler.java

@@ -32,10 +32,6 @@ public class GetTrackHasGenreByIdHandler implements ActionHandler {
                     TrackHasGenreMessages.GetTrackHasGenreByIdRequest.parseFrom(requestPayload);
             int id = getByIdRequest.getId();
 
-            if (id <= 0) {
-                throw new IllegalArgumentException("ID must be greater than 0");
-            }
-
             Optional<TrackHasGenre> trackHasGenreOpt = trackHasGenreService.getTrackHasGenreById(id);
 
             if (trackHasGenreOpt.isEmpty()){
@@ -49,13 +45,7 @@ public class GetTrackHasGenreByIdHandler implements ActionHandler {
                     .setTrackhasgenre(trackHasGenreProto)
                     .build();
             return TransportProtocol.Response.newBuilder()
-                    .setStatusCode(200)
                     .setPayload(getByIdResponse.toByteString());
-        } catch (IllegalArgumentException e) {
-            logger.error("Validation error", e);
-            return TransportProtocol.Response.newBuilder()
-                    .setStatusCode(400)
-                    .setPayload(ByteString.copyFromUtf8("Validation error: " + e.getMessage()));
         } catch (Exception e) {
             logger.error("Error getting track has genre by ID", e);
             return TransportProtocol.Response.newBuilder()