diff --git a/app/Services/Equipment/ServerService.php b/app/Services/Equipment/ServerService.php
index 9a595c8..91fec44 100644
--- a/app/Services/Equipment/ServerService.php
+++ b/app/Services/Equipment/ServerService.php
@@ -149,14 +149,18 @@ class ServerService extends EquipmentService
         }
 
         if ($oldEntity->getIP() !== $entity->getIP()) {
-            service('part_ipservice')->detachFromServer($oldEntity);
+            if (!$oldEntity->getIP()) { //null이거나 공백인경우
+                service('part_ipservice')->detachFromServer($oldEntity);
+            }
             if ($entity->getIP() !== null) {
                 service('part_ipservice')->attachToServer($entity);
             }
         }
 
         if ($oldEntity->getSwitchInfoUid() !== $entity->getSwitchInfoUid()) {
-            service('part_switchservice')->detachFromServer($oldEntity);
+            if (!$oldEntity->getSwitchInfoUid()) { //null이거나 공백인경우
+                service('part_switchservice')->detachFromServer($oldEntity);
+            }
             if ($entity->getSwitchInfoUid() !== null) {
                 service('part_switchservice')->attachToServer($entity);
             }
@@ -169,7 +173,7 @@ class ServerService extends EquipmentService
             }
         }
 
-        // ✅ 서비스 유지중이면 정상 동기화 (해지 시는 deatchFromService에서 따로 처리)
+        // ✅ 서비스 유지중이면 정상 동기화 (해지 시는 detachFromService에서 따로 처리)
         if ($entity->getServiceInfoUid() !== null) {
             $serviceEntity = service('customer_serviceservice')->getEntity($entity->getServiceInfoUid());
             if (!$serviceEntity instanceof ServiceEntity) {