diff --git a/src/main/java/com/example/demo/app/infra/entity/AllocationId.java b/src/main/java/com/example/demo/app/infra/entity/AllocationId.java
new file mode 100644
index 0000000..3812864
--- /dev/null
+++ b/src/main/java/com/example/demo/app/infra/entity/AllocationId.java
@@ -0,0 +1,16 @@
+package com.example.demo.app.infra.entity;
+
+import java.io.Serializable;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class AllocationId implements Serializable {
+    private Long categoryEntity;
+    
+    private Long courseEntity;
+}