diff --git a/hawkbit-rest/hawkbit-mgmt-resource/src/main/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtRolloutResource.java b/hawkbit-rest/hawkbit-mgmt-resource/src/main/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtRolloutResource.java
index 0cee352c1..470419ca9 100644
--- a/hawkbit-rest/hawkbit-mgmt-resource/src/main/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtRolloutResource.java
+++ b/hawkbit-rest/hawkbit-mgmt-resource/src/main/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtRolloutResource.java
@@ -9,6 +9,7 @@
 package org.eclipse.hawkbit.mgmt.rest.resource;
 
 import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
@@ -271,6 +272,11 @@ public class MgmtRolloutResource implements MgmtRolloutRestApi {
 
         final RolloutGroup rolloutGroup = rolloutGroupManagement.getWithDetailedStatus(groupId)
                 .orElseThrow(() -> new EntityNotFoundException(RolloutGroup.class, rolloutId));
+
+        if (!Objects.equals(rolloutId, rolloutGroup.getRollout().getId())) {
+            throw new EntityNotFoundException(RolloutGroup.class, groupId);
+        }
+
         return ResponseEntity.ok(MgmtRolloutMapper.toResponseRolloutGroup(rolloutGroup, true,
                 tenantConfigHelper.isConfirmationFlowEnabled()));
     }
diff --git a/hawkbit-rest/hawkbit-mgmt-resource/src/test/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtRolloutResourceTest.java b/hawkbit-rest/hawkbit-mgmt-resource/src/test/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtRolloutResourceTest.java
index 41f1c5850..9543517a5 100644
--- a/hawkbit-rest/hawkbit-mgmt-resource/src/test/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtRolloutResourceTest.java
+++ b/hawkbit-rest/hawkbit-mgmt-resource/src/test/java/org/eclipse/hawkbit/mgmt/rest/resource/MgmtRolloutResourceTest.java
@@ -683,6 +683,33 @@ class MgmtRolloutResourceTest extends AbstractManagementApiIntegrationTest {
                         : jsonPath("confirmationRequired").doesNotExist());
     }
 
+    @Test
+    @Description("The relation between deploy group and rollout should be validated.")
+    void deployGroupsShouldValidateRelationWithRollout() throws Exception {
+        // setup
+        final int amountTargets = 8;
+        testdataFactory.createTargets(amountTargets, "rollout", "rollout");
+        final DistributionSet dsA = testdataFactory.createDistributionSet("");
+
+        // create rollout including the created targets with prefix 'rollout'
+        final Rollout rollout1 = createRollout("rollout1", 4, dsA.getId(), "controllerId==rollout*",
+            false);
+
+        final Rollout rollout2 = createRollout("rollout2", 1, dsA.getId(), "controllerId==rollout*",
+            false);
+
+        rolloutManagement.start(rollout1.getId());
+        rolloutManagement.start(rollout2.getId());
+        rolloutHandler.handleAll();
+
+        final RolloutGroup firstGroup = rolloutGroupManagement
+            .findByRollout(PageRequest.of(0, 1, Direction.ASC, "id"), rollout1.getId()).getContent().get(0);
+
+        // make request for firstGroupId and the rolloutId of the second rollout (the one with no groups)
+        mvc.perform(get("/rest/v1/rollouts/{rolloutId}/deploygroups/{groupId}", rollout2.getId(), firstGroup.getId())
+                .accept(MediaType.APPLICATION_JSON)).andDo(MockMvcResultPrinter.print()).andExpect(status().isNotFound());
+    }
+
     @Test
     @Description("Testing that starting the rollout switches the state to starting and then to running")
     void startingRolloutSwitchesIntoRunningState() throws Exception {