diff --git a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.ts b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.ts
index 5edcf84345..bb9c3c87f6 100644
--- a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.ts
+++ b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.ts
@@ -40,7 +40,6 @@ import {
   Lwm2mProfileConfigModels,
   ObjectLwM2M,
   OBSERVE,
-  OBSERVE_ATTR_TELEMETRY,
   PowerMode,
   PowerModeTranslationMap,
   RESOURCES,
@@ -517,7 +516,7 @@ export class Lwm2mDeviceProfileTransportConfigurationComponent implements Contro
   }
 
   removeObjectsList = (value: ObjectLwM2M): void => {
-    const objectsOld = this.lwm2mDeviceProfileFormGroup.get(OBSERVE_ATTR_TELEMETRY).value.clientLwM2M;
+    const objectsOld = this.lwm2mDeviceProfileFormGroup.get('observeAttrTelemetry').value;
     const isIdIndex = (element) => element.keyId === value.keyId;
     const index = objectsOld.findIndex(isIdIndex);
     if (index >= 0) {
diff --git a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-profile-config.models.ts b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-profile-config.models.ts
index a6bfd39eb6..d9c2eb87ca 100644
--- a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-profile-config.models.ts
+++ b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-profile-config.models.ts
@@ -20,7 +20,6 @@ export const PAGE_SIZE_LIMIT = 50;
 export const INSTANCES = 'instances';
 export const INSTANCE = 'instance';
 export const RESOURCES = 'resources';
-export const OBSERVE_ATTR_TELEMETRY = 'observeAttrTelemetry';
 export const OBSERVE = 'observe';
 export const ATTRIBUTE = 'attribute';
 export const TELEMETRY = 'telemetry';