diff --git a/services/nginx/app/classes/system_search_service.php b/services/nginx/app/classes/system_search_service.php
index e836f3c9..b0c5e4a6 100644
--- a/services/nginx/app/classes/system_search_service.php
+++ b/services/nginx/app/classes/system_search_service.php
@@ -207,25 +207,28 @@ class system_search_service
                     $activeTypes,
                     $this->associationEntityTypes()
                 ));
-                foreach ($customerNumbers as $customerNumber) {
-                    $associated = $this->executeLexicalSearch(
-                        $associationTypes,
-                        [(string)$customerNumber],
-                        [],
-                        $ownOnlyTypes,
-                        $ownCustomerNumber,
-                        $permissionsCatalogAll,
-                        $permissionsCatalogOwn,
-                        $moduleConfigVisibility,
-                        [$customerNumber]
-                    );
-                    foreach ($associated as &$item) {
-                        if (!isset($item['association_reason'])) {
-                            $item['association_reason'] = 'customer:' . $customerNumber;
+                $associationTypes = array_values(array_diff($associationTypes, $ownOnlyTypes));
+                if (!empty($associationTypes)) {
+                    foreach ($customerNumbers as $customerNumber) {
+                        $associated = $this->executeLexicalSearch(
+                            $associationTypes,
+                            [(string)$customerNumber],
+                            [],
+                            $ownOnlyTypes,
+                            $ownCustomerNumber,
+                            $permissionsCatalogAll,
+                            $permissionsCatalogOwn,
+                            $moduleConfigVisibility,
+                            [$customerNumber]
+                        );
+                        foreach ($associated as &$item) {
+                            if (!isset($item['association_reason'])) {
+                                $item['association_reason'] = 'customer:' . $customerNumber;
+                            }
+                            $item['score'] = max((int)$item['score'], 35);
                         }
-                        $item['score'] = max((int)$item['score'], 35);
+                        $initialResults = $this->mergeResults($initialResults, $associated);
                     }
-                    $initialResults = $this->mergeResults($initialResults, $associated);
                 }
             }
         }
diff --git a/services/nginx/app/tests/Unit/Search/SystemSearchServiceIntentFlowTest.php b/services/nginx/app/tests/Unit/Search/SystemSearchServiceIntentFlowTest.php
index fa02c08b..fc3261bd 100644
--- a/services/nginx/app/tests/Unit/Search/SystemSearchServiceIntentFlowTest.php
+++ b/services/nginx/app/tests/Unit/Search/SystemSearchServiceIntentFlowTest.php
@@ -385,6 +385,30 @@ it('caps AI-driven expanded terms to prevent query amplification', function ():
     expect($maxLen)->toBeLessThanOrEqual(64);
 });
 
+it('does not expand associations for own-only entity types', function (): void {
+    $parser = new FakeSystemSearchIntentParser();
+    $service = new TestableSystemSearchService($parser, [
+        [[
+            'entity_type' => 'customers',
+            'entity_id' => '10',
+            'title' => 'Acme',
+            'customer_number' => 1234,
+            'score' => 80,
+        ]],
+        [],
+    ]);
+
+    $service->search([
+        'query' => 'acme',
+        'allowed_types' => ['customers', 'orders'],
+        'own_only_types' => ['orders'],
+        'own_customer_number' => 4444,
+        'include_associations' => true,
+    ]);
+
+    expect(count($service->lexicalCalls))->toBe(1);
+});
+
 it('expands danish discount wording into lexical discount synonyms', function (): void {
     $parser = new FakeSystemSearchIntentParser();
     $service = new TestableSystemSearchService($parser, [[