userInfo primamry key consists or user/rankingPointsSum now

src/main/java/hhn/labsw/bugageocaching/entities/User_Info.java

@@ -7,12 +7,14 @@ import java.io.Serializable;
 
 @Entity
 @Table
+@IdClass(User_InfoID.class)
 public class User_Info implements Serializable {
 
   @Id
   @OneToOne
   private User user;
 
+  @Id
   private int rankingPointsSum;
 
   @ManyToOne

src/main/java/hhn/labsw/bugageocaching/entities/User_InfoID.java

@@ -0,0 +1,8 @@
+package hhn.labsw.bugageocaching.entities;
+
+import java.io.Serializable;
+
+public class User_InfoID implements Serializable {
+  private int user;
+  private int rankingPointsSum;
+}