diff --git a/src/main/java/de/ph87/tools/tools/numbers/Numbers.java b/src/main/java/de/ph87/tools/tools/numbers/Numbers.java
index f6339b7..14233ac 100644
--- a/src/main/java/de/ph87/tools/tools/numbers/Numbers.java
+++ b/src/main/java/de/ph87/tools/tools/numbers/Numbers.java
@@ -4,7 +4,6 @@ import de.ph87.tools.group.Group;
 import de.ph87.tools.tools.numbers.uuid.NumbersAbstract;
 import de.ph87.tools.tools.numbers.uuid.NumbersUuid;
 import de.ph87.tools.user.User;
-import de.ph87.tools.user.reference.UserReference;
 import jakarta.annotation.Nullable;
 import jakarta.persistence.*;
 import lombok.*;
@@ -50,11 +49,11 @@ public class Numbers extends NumbersAbstract {
   private ZonedDateTime read = null;
 
   @NonNull
+  @ManyToMany
   @OrderColumn
-  @OneToMany(orphanRemoval = true)
-  private List<UserReference> users;
+  private List<User> users;
 
-  public Numbers(@NonNull final Group group, @NonNull final List<UserReference> users) {
+  public Numbers(@NonNull final Group group, @NonNull final List<User> users) {
     this.group = group;
     this.users = users;
   }
@@ -68,17 +67,17 @@ public class Numbers extends NumbersAbstract {
 
   @Nullable
   public Integer getNumberForUser(@NonNull final User user) {
-    for (int userReferenceIndex = 0; userReferenceIndex < users.size(); userReferenceIndex++) {
-      final UserReference userReference = users.get(userReferenceIndex);
-      if (userReference.getUser() != null && userReference.getUser().equals(user)) {
-        return userReferenceIndex + 1;
+    for (int index = 0; index < users.size(); index++) {
+      final User userAtIndex = users.get(index);
+      if (user.equals(userAtIndex)) {
+        return index + 1;
       }
     }
     return null;
   }
 
   public boolean containsUser(@NonNull final User user) {
-    return users.stream().anyMatch(u -> user.equals(u.getUser()));
+    return users.stream().anyMatch(user::equals);
   }
 
 }
diff --git a/src/main/java/de/ph87/tools/tools/numbers/NumbersService.java b/src/main/java/de/ph87/tools/tools/numbers/NumbersService.java
index 5a19444..0ade3cc 100644
--- a/src/main/java/de/ph87/tools/tools/numbers/NumbersService.java
+++ b/src/main/java/de/ph87/tools/tools/numbers/NumbersService.java
@@ -9,8 +9,6 @@ import de.ph87.tools.tools.numbers.uuid.NumbersUuid;
 import de.ph87.tools.user.User;
 import de.ph87.tools.user.UserAccessService;
 import de.ph87.tools.user.push.UserPushService;
-import de.ph87.tools.user.reference.UserReference;
-import de.ph87.tools.user.reference.UserReferenceService;
 import de.ph87.tools.user.uuid.UserPrivateUuid;
 import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
@@ -24,10 +22,10 @@ import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.server.ResponseStatusException;
 
 import java.time.ZonedDateTime;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
-import java.util.stream.Collectors;
 
 @Slf4j
 @Service
@@ -39,8 +37,6 @@ public class NumbersService {
 
   private final GroupAccessService groupAccessService;
 
-  private final UserReferenceService userReferenceService;
-
   private final UserPushService userPushService;
 
   private final UserAccessService userAccessService;
@@ -49,7 +45,7 @@ public class NumbersService {
 
   public void create(@NonNull final UserPrivateUuid userPrivateUuid, @NonNull final GroupUuid groupUuid) {
     final GroupAccess access = groupAccessService.ownerAccess(userPrivateUuid, groupUuid);
-    final List<UserReference> users = access.getGroup().getUsers().stream().map(userReferenceService::create).collect(Collectors.toList());
+    final List<User> users = new ArrayList<>(access.getGroup().getUsers());
     Collections.shuffle(users);
     final Numbers numbers = numbersRepository.save(new Numbers(access.getGroup(), users));
     publish(numbers);
@@ -58,7 +54,6 @@ public class NumbersService {
   private void publish(@NonNull final Numbers numbers) {
     numbers.getUsers()
       .stream()
-      .map(UserReference::getUser)
       .filter(Objects::nonNull)
       .forEach(user -> publish(numbers, user));
   }
diff --git a/src/main/java/de/ph87/tools/user/reference/UserReference.java b/src/main/java/de/ph87/tools/user/reference/UserReference.java
deleted file mode 100644
index 40d9fb5..0000000
--- a/src/main/java/de/ph87/tools/user/reference/UserReference.java
+++ /dev/null
@@ -1,35 +0,0 @@
-package de.ph87.tools.user.reference;
-
-import de.ph87.tools.user.User;
-import jakarta.annotation.Nullable;
-import jakarta.persistence.*;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.NonNull;
-import lombok.ToString;
-
-@Entity
-@Getter
-@ToString
-@NoArgsConstructor
-@Table(name = "`user_reference`")
-public class UserReference {
-
-  @Id
-  @GeneratedValue
-  private long id;
-
-  @Nullable
-  @ManyToOne
-  private User user;
-
-  @NonNull
-  @Column(nullable = false)
-  private String name;
-
-  public UserReference(@NonNull final User user) {
-    this.user = user;
-    this.name = user.getName();
-  }
-
-}
diff --git a/src/main/java/de/ph87/tools/user/reference/UserReferenceRepository.java b/src/main/java/de/ph87/tools/user/reference/UserReferenceRepository.java
deleted file mode 100644
index afefac8..0000000
--- a/src/main/java/de/ph87/tools/user/reference/UserReferenceRepository.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package de.ph87.tools.user.reference;
-
-import org.springframework.data.repository.ListCrudRepository;
-
-public interface UserReferenceRepository extends ListCrudRepository<UserReference, Long> {
-
-}
diff --git a/src/main/java/de/ph87/tools/user/reference/UserReferenceService.java b/src/main/java/de/ph87/tools/user/reference/UserReferenceService.java
deleted file mode 100644
index bcb5b98..0000000
--- a/src/main/java/de/ph87/tools/user/reference/UserReferenceService.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package de.ph87.tools.user.reference;
-
-import de.ph87.tools.user.User;
-import lombok.NonNull;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-
-@Slf4j
-@Service
-@Transactional
-@RequiredArgsConstructor
-public class UserReferenceService {
-
-  private final UserReferenceRepository userReferenceRepository;
-
-  @NonNull
-  public UserReference create(@NonNull final User user) {
-    return userReferenceRepository.save(new UserReference(user));
-  }
-
-}