diff --git a/hawkbit-mgmt/hawkbit-mgmt-resource/src/main/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtTargetTypeResource.java b/hawkbit-mgmt/hawkbit-mgmt-resource/src/main/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtTargetTypeResource.java
index 267bcbb02d..b5192619c0 100644
--- a/hawkbit-mgmt/hawkbit-mgmt-resource/src/main/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtTargetTypeResource.java
+++ b/hawkbit-mgmt/hawkbit-mgmt-resource/src/main/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtTargetTypeResource.java
@@ -10,7 +10,6 @@
 package org.eclipse.hawkbit.mgmt.rest.resource;
 
 import java.util.List;
-import java.util.stream.Collectors;
 
 import lombok.extern.slf4j.Slf4j;
 import org.eclipse.hawkbit.mgmt.json.model.PagedList;
@@ -119,7 +118,7 @@ public ResponseEntity<Void> removeCompatibleDistributionSet(final Long targetTyp
     public ResponseEntity<Void> addCompatibleDistributionSets(
             final Long targetTypeId, final List<MgmtDistributionSetTypeAssignment> distributionSetTypeIds) {
         targetTypeManagement.assignCompatibleDistributionSetTypes(
-                targetTypeId, distributionSetTypeIds.stream().map(MgmtDistributionSetTypeAssignment::getId).collect(Collectors.toList()));
+                targetTypeId, distributionSetTypeIds.stream().map(MgmtDistributionSetTypeAssignment::getId).toList());
         return ResponseEntity.ok().build();
     }
 
diff --git a/hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/model/DistributionSetType.java b/hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/model/DistributionSetType.java
index d8673a288f..7ab6edf7c4 100644
--- a/hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/model/DistributionSetType.java
+++ b/hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/model/DistributionSetType.java
@@ -99,19 +99,10 @@ default boolean containsOptionalModuleType(final Long softwareModuleTypeId) {
         return getOptionalModuleTypes().stream().anyMatch(element -> element.getId().equals(softwareModuleTypeId));
     }
 
-    /**
-     * Compares the modules of this {@link DistributionSetType} and the given
-     * one.
-     *
-     * @param dsType to compare with
-     * @return <code>true</code> if the lists are identical.
-     */
-    boolean areModuleEntriesIdentical(DistributionSetType dsType);
-
     /**
      * @param distributionSet to check for completeness
      * @return <code>true</code> if the all mandatory software module types are
      *         in the system.
      */
     boolean checkComplete(DistributionSet distributionSet);
-}
+}
\ No newline at end of file
diff --git a/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/management/JpaTargetTypeManagement.java b/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/management/JpaTargetTypeManagement.java
index 94a70ad6e0..0ce1e8b600 100644
--- a/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/management/JpaTargetTypeManagement.java
+++ b/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/management/JpaTargetTypeManagement.java
@@ -13,6 +13,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
+import java.util.function.ToLongFunction;
 
 import org.eclipse.hawkbit.repository.QuotaManagement;
 import org.eclipse.hawkbit.repository.TargetTypeFields;
@@ -197,7 +198,7 @@ public TargetType assignCompatibleDistributionSetTypes(final long id,
         }
 
         final JpaTargetType type = getByIdAndThrowIfNotFound(id);
-        assertDistributionSetTypeQuota(id, distributionSetTypeIds.size());
+        assertDistributionSetTypeQuota(id, distributionSetTypeIds.size(), typeId -> type.getCompatibleDistributionSetTypes().size());
         dsTypes.forEach(type::addCompatibleDistributionSetType);
 
         return targetTypeRepository.save(type);
@@ -224,7 +225,8 @@ private void assertDistributionSetTypeExists(final Long typeId) {
 
     private JpaTargetType getByIdAndThrowIfNotFound(final Long id) {
         return targetTypeRepository
-                .findById(id).orElseThrow(() -> new EntityNotFoundException(TargetType.class, id));
+                .findById(id)
+                .orElseThrow(() -> new EntityNotFoundException(TargetType.class, id));
     }
 
     /**
@@ -235,8 +237,9 @@ private JpaTargetType getByIdAndThrowIfNotFound(final Long id) {
      * @param requested number of distribution set types to check
      * @throws AssignmentQuotaExceededException if the software module type quota is exceeded
      */
-    private void assertDistributionSetTypeQuota(final long id, final int requested) {
-        QuotaHelper.assertAssignmentQuota(id, requested, quotaManagement.getMaxDistributionSetTypesPerTargetType(),
-                DistributionSetType.class, TargetType.class, targetTypeRepository::countDsSetTypesById);
+    private void assertDistributionSetTypeQuota(final long id, final int requested, final ToLongFunction<Long> countFct) {
+        QuotaHelper.assertAssignmentQuota(
+                id, requested, quotaManagement.getMaxDistributionSetTypesPerTargetType(),
+                DistributionSetType.class, TargetType.class, countFct);
     }
-}
+}
\ No newline at end of file
diff --git a/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/model/JpaDistributionSetType.java b/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/model/JpaDistributionSetType.java
index 9a885b127f..5964b1a4fc 100644
--- a/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/model/JpaDistributionSetType.java
+++ b/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/model/JpaDistributionSetType.java
@@ -60,7 +60,7 @@ public class JpaDistributionSetType extends AbstractJpaTypeEntity implements Dis
 
     @OneToMany(
             mappedBy = "dsType", targetEntity = DistributionSetTypeElement.class,
-            fetch = FetchType.EAGER, cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REMOVE }, orphanRemoval = true)
+            cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REMOVE }, orphanRemoval = true)
     private Set<DistributionSetTypeElement> elements = new HashSet<>();
 
     @Setter
@@ -68,9 +68,6 @@ public class JpaDistributionSetType extends AbstractJpaTypeEntity implements Dis
     @Column(name = "deleted")
     private boolean deleted;
 
-    @ManyToMany(mappedBy = "distributionSetTypes", targetEntity = JpaTargetType.class, fetch = FetchType.LAZY)
-    private List<TargetType> compatibleToTargetTypes;
-
     public JpaDistributionSetType(final String key, final String name, final String description) {
         this(key, name, description, null);
     }
@@ -95,21 +92,6 @@ public Set<SoftwareModuleType> getOptionalModuleTypes() {
                 .collect(Collectors.toSet());
     }
 
-    @Override
-    public boolean areModuleEntriesIdentical(final DistributionSetType dsType) {
-        if (dsType instanceof JpaDistributionSetType jpaDsType) {
-            if (isOneModuleListEmpty(jpaDsType)) {
-                return false;
-            } else if (areBothModuleListsEmpty(jpaDsType)) {
-                return true;
-            } else {
-                return new HashSet<>(jpaDsType.elements).equals(elements);
-            }
-        } else {
-            return false;
-        }
-    }
-
     @Override
     public boolean checkComplete(final DistributionSet distributionSet) {
         final List<SoftwareModuleType> smTypes = distributionSet.getModules().stream()
@@ -163,15 +145,6 @@ public void fireDeleteEvent() {
                 getTenant(), getId(), getClass(), EventPublisherHolder.getInstance().getApplicationId()));
     }
 
-    private boolean isOneModuleListEmpty(final JpaDistributionSetType dsType) {
-        return (!CollectionUtils.isEmpty(dsType.elements) && CollectionUtils.isEmpty(elements)) ||
-                (CollectionUtils.isEmpty(dsType.elements) && !CollectionUtils.isEmpty(elements));
-    }
-
-    private boolean areBothModuleListsEmpty(final JpaDistributionSetType dsType) {
-        return CollectionUtils.isEmpty(dsType.elements) && CollectionUtils.isEmpty(elements);
-    }
-
     private JpaDistributionSetType setModuleType(final SoftwareModuleType smType, final boolean mandatory) {
         if (elements.isEmpty()) {
             elements.add(new DistributionSetTypeElement(this, (JpaSoftwareModuleType) smType, mandatory));
diff --git a/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/repository/TargetTypeRepository.java b/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/repository/TargetTypeRepository.java
index edced60d51..52ccd9de0b 100644
--- a/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/repository/TargetTypeRepository.java
+++ b/hawkbit-repository/hawkbit-repository-jpa/src/main/java/org/eclipse/hawkbit/repository/jpa/repository/TargetTypeRepository.java
@@ -22,38 +22,17 @@
 import org.springframework.transaction.annotation.Transactional;
 
 /**
- * {@link PagingAndSortingRepository} and {@link org.springframework.data.repository.CrudRepository} for
- * {@link JpaTargetType}.
+ * {@link PagingAndSortingRepository} and {@link org.springframework.data.repository.CrudRepository} for {@link JpaTargetType}.
  */
 @Transactional(readOnly = true)
-public interface TargetTypeRepository
-        extends BaseEntityRepository<JpaTargetType> {
+public interface TargetTypeRepository extends BaseEntityRepository<JpaTargetType> {
 
-    /**
-     * Counts the distributions set types compatible with that type
-     * <p/>
-     * No access control applied.
-     *
-     * @param id target type id
-     * @return the count
-     */
-    @Query(value = "SELECT COUNT (t.id) FROM JpaDistributionSetType t JOIN t.compatibleToTargetTypes tt WHERE tt.id = :id")
-    long countDsSetTypesById(@Param("id") Long id);
-
-    /**
-     * @param dsTypeId to search for
-     * @return all {@link TargetType}s in the repository with given
-     *         {@link TargetType#getName()}
-     */
     default List<JpaTargetType> findByDsType(@Param("id") final Long dsTypeId) {
         return findAll(Specification.where(TargetTypeSpecification.hasDsSetType(dsTypeId)));
     }
 
-    /**
-     * @param tenant Tenant
-     */
     @Modifying
     @Transactional
     @Query("DELETE FROM JpaTargetType t WHERE t.tenant = :tenant")
     void deleteByTenant(@Param("tenant") String tenant);
-}
+}
\ No newline at end of file