diff --git a/app/Http/Controllers/Apis/Protected/Summit/Factories/SummitVenueRoomValidationRulesFactory.php b/app/Http/Controllers/Apis/Protected/Summit/Factories/SummitVenueRoomValidationRulesFactory.php
index b9642573..82f2a933 100644
--- a/app/Http/Controllers/Apis/Protected/Summit/Factories/SummitVenueRoomValidationRulesFactory.php
+++ b/app/Http/Controllers/Apis/Protected/Summit/Factories/SummitVenueRoomValidationRulesFactory.php
@@ -27,17 +27,10 @@ final class SummitVenueRoomValidationRulesFactory
 
         $rules = SummitAbstractLocationValidationRulesFactory::build($data, $update);
 
-        if($update) {
-            return array_merge([
-                'capacity'           => 'sometimes|integer:min:0',
-                'override_blackouts' => 'sometimes|boolean',
-                'floor_id'           => 'sometimes|integer',
-            ], $rules);
-        }
-
         return array_merge([
             'capacity'           => 'sometimes|integer:min:0',
             'override_blackouts' => 'sometimes|boolean',
+            'floor_id'           => 'sometimes|integer',
         ], $rules);
     }
 }
\ No newline at end of file
diff --git a/app/Http/Controllers/Apis/Protected/Summit/OAuth2PresentationCategoryGroupController.php b/app/Http/Controllers/Apis/Protected/Summit/OAuth2PresentationCategoryGroupController.php
index 01551851..95e61c01 100644
--- a/app/Http/Controllers/Apis/Protected/Summit/OAuth2PresentationCategoryGroupController.php
+++ b/app/Http/Controllers/Apis/Protected/Summit/OAuth2PresentationCategoryGroupController.php
@@ -365,8 +365,34 @@ final class OAuth2PresentationCategoryGroupController
         }
     }
 
+    /**
+     * @param $summit_id
+     * @param $track_group_id
+     * @return mixed
+     */
     public function deleteTrackGroupBySummit($summit_id, $track_group_id){
+        try {
 
+            $summit  = SummitFinderStrategyFactory::build($this->summit_repository, $this->resource_server_context)->find($summit_id);
+            if (is_null($summit)) return $this->error404();
+
+            $this->presentation_category_group_service->deleteTrackGroup($summit, $track_group_id);
+
+            return $this->deleted();
+        }
+        catch (ValidationException $ex1) {
+            Log::warning($ex1);
+            return $this->error412([$ex1->getMessage()]);
+        }
+        catch(EntityNotFoundException $ex2)
+        {
+            Log::warning($ex2);
+            return $this->error404(['message'=> $ex2->getMessage()]);
+        }
+        catch (Exception $ex) {
+            Log::error($ex);
+            return $this->error500($ex);
+        }
     }
 
     /**
diff --git a/app/Models/Foundation/Summit/Events/Presentations/PrivatePresentationCategoryGroup.php b/app/Models/Foundation/Summit/Events/Presentations/PrivatePresentationCategoryGroup.php
index 7fecef67..c3780de6 100644
--- a/app/Models/Foundation/Summit/Events/Presentations/PrivatePresentationCategoryGroup.php
+++ b/app/Models/Foundation/Summit/Events/Presentations/PrivatePresentationCategoryGroup.php
@@ -47,8 +47,8 @@ class PrivatePresentationCategoryGroup extends PresentationCategoryGroup
     /**
      * @ORM\ManyToMany(targetEntity="models\main\Group")
      * @ORM\JoinTable(name="PrivatePresentationCategoryGroup_AllowedGroups",
-     *      joinColumns={@ORM\JoinColumn(name="PrivatePresentationCategoryGroupID", referencedColumnName="ID")},
-     *      inverseJoinColumns={@ORM\JoinColumn(name="GroupID", referencedColumnName="ID")}
+     *      joinColumns={@ORM\JoinColumn(name="PrivatePresentationCategoryGroupID", referencedColumnName="ID", onDelete="CASCADE")},
+     *      inverseJoinColumns={@ORM\JoinColumn(name="GroupID", referencedColumnName="ID", onDelete="CASCADE")}
      * )
      * @var Group[]
      */
diff --git a/app/Models/Foundation/Summit/Locations/SummitLocationConstants.php b/app/Models/Foundation/Summit/Locations/SummitLocationConstants.php
index e13f38fa..05233f9a 100644
--- a/app/Models/Foundation/Summit/Locations/SummitLocationConstants.php
+++ b/app/Models/Foundation/Summit/Locations/SummitLocationConstants.php
@@ -15,6 +15,8 @@ use models\summit\SummitAirport;
 use models\summit\SummitExternalLocation;
 use models\summit\SummitHotel;
 use models\summit\SummitVenue;
+use models\summit\SummitVenueRoom;
+
 /**
  * Class SummitLocationConstants
  * @package App\Models\Foundation\Summit\Locations
@@ -26,5 +28,6 @@ final class SummitLocationConstants
         SummitAirport::ClassName,
         SummitHotel::ClassName,
         SummitExternalLocation::ClassName,
+        SummitVenueRoom::ClassName
     ];
 }
\ No newline at end of file
diff --git a/app/Services/Model/SummitLocationService.php b/app/Services/Model/SummitLocationService.php
index 33f4ae08..be560715 100644
--- a/app/Services/Model/SummitLocationService.php
+++ b/app/Services/Model/SummitLocationService.php
@@ -693,7 +693,7 @@ final class SummitLocationService
 
             if(isset($data['floor_id'])){
                 $floor_id = intval($data['floor_id']);
-                $floor = $venue->getFloor($floor_id);
+                $floor    = $venue->getFloor($floor_id);
 
                 if(is_null($floor)){
                     throw new EntityNotFoundException
@@ -854,7 +854,6 @@ final class SummitLocationService
                 }
             }
 
-
             // request to update order
             if (isset($data['order']) && intval($data['order']) != $room->getOrder()) {
 
diff --git a/tests/OAuth2TrackGroupsApiTest.php b/tests/OAuth2TrackGroupsApiTest.php
index bc5c5f77..b06f22ac 100644
--- a/tests/OAuth2TrackGroupsApiTest.php
+++ b/tests/OAuth2TrackGroupsApiTest.php
@@ -256,4 +256,33 @@ final class OAuth2TrackGroupsApiTest extends ProtectedApiTest
         $this->assertResponseStatus(201);
     }
 
+    /**
+     * @param int $summit_id
+     * @param int $track_group_id
+     */
+    public function testDeleteExistentTrackGroup($summit_id = 24, $track_group_id = 85){
+
+        $params = [
+            'id'             => $summit_id,
+            'track_group_id' => $track_group_id
+        ];
+
+        $headers = [
+            "HTTP_Authorization" => " Bearer " . $this->access_token,
+            "CONTENT_TYPE"        => "application/json"
+        ];
+
+        $response = $this->action(
+            "DELETE",
+            "OAuth2PresentationCategoryGroupController@deleteTrackGroupBySummit",
+            $params,
+            [],
+            [],
+            [],
+            $headers
+        );
+
+        $content = $response->getContent();
+        $this->assertResponseStatus(204);
+    }
 }
\ No newline at end of file