Overrode RecipeStarId equals() and hashcode().

src/main/java/app/mealsmadeeasy/api/recipe/star/RecipeStarId.java

@@ -3,6 +3,8 @@ package app.mealsmadeeasy.api.recipe.star;
 import jakarta.persistence.Column;
 import jakarta.persistence.Embeddable;
 
+import java.util.Objects;
+
 @Embeddable
 public class RecipeStarId {
 
@@ -28,6 +30,20 @@ public class RecipeStarId {
         this.recipeId = recipeId;
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o instanceof RecipeStarId other) {
+            return this.recipeId.equals(other.recipeId) && this.ownerUsername.equals(other.ownerUsername);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.recipeId, this.ownerUsername);
+    }
+
     @Override
     public String toString() {
         return "RecipeStarId(" + this.recipeId + ", " + this.ownerUsername + ")";