diff --git a/src/context/service/database/Device.py b/src/context/service/database/Device.py
index e7aa4170e389b4cf12a361ba8ef3785c9bb041f3..685d0052ef89ac42647a4670b37a2b723c2372f7 100644
--- a/src/context/service/database/Device.py
+++ b/src/context/service/database/Device.py
@@ -20,7 +20,7 @@ from sqlalchemy_cockroachdb import run_transaction
 from typing import Dict, List, Optional, Set, Tuple
 from common.method_wrappers.ServiceExceptions import InvalidArgumentException, NotFoundException
 from common.proto.context_pb2 import Device, DeviceFilter, DeviceId, TopologyId
-#from common.tools.grpc.Tools import grpc_message_to_json_string
+from common.tools.grpc.Tools import grpc_message_to_json_string
 from common.tools.object_factory.Device import json_device_id
 from context.service.database.uuids.Topology import topology_get_uuid
 from .models.DeviceModel import DeviceModel
@@ -32,8 +32,6 @@ from .models.enums.KpiSampleType import grpc_to_enum__kpi_sample_type
 from .uuids.Device import device_get_uuid
 from .uuids.EndPoint import endpoint_get_uuid
 from .ConfigRule import compose_config_rules_data, upsert_config_rules
-from common.tools.grpc.Tools import grpc_message_to_json
-import json
 
 LOGGER = logging.getLogger(__name__)
 
@@ -118,7 +116,7 @@ def device_set(db_engine : Engine, request : Device) -> Tuple[Dict, bool]:
             'name'             : endpoint_name,
             'endpoint_type'    : endpoint.endpoint_type,
             'kpi_sample_types' : kpi_sample_types,
-            'endpoint_location': json.dumps(grpc_message_to_json(endpoint.endpoint_location)),
+            'endpoint_location': grpc_message_to_json_string(endpoint.endpoint_location),
             'created_at'       : now,
             'updated_at'       : now,
         })
diff --git a/src/context/service/database/models/ServiceModel.py b/src/context/service/database/models/ServiceModel.py
index 8efc8e9598a0369e7c23e46886cfe3fedaddf9c6..73914a75b1cc8c3d872bb6858368a556b98c78e3 100644
--- a/src/context/service/database/models/ServiceModel.py
+++ b/src/context/service/database/models/ServiceModel.py
@@ -32,7 +32,7 @@ class ServiceModel(_Base):
     created_at     = Column(DateTime, nullable=False)
     updated_at     = Column(DateTime, nullable=False)
 
-    context           = relationship('ContextModel', back_populates='services', lazy='selectin',)
+    context           = relationship('ContextModel', back_populates='services', lazy='selectin')
     service_endpoints = relationship('ServiceEndPointModel') # lazy='selectin', back_populates='service'
     constraints       = relationship('ServiceConstraintModel', passive_deletes=True) # lazy='selectin', back_populates='service'
     config_rules      = relationship('ServiceConfigRuleModel', passive_deletes=True) # lazy='selectin', back_populates='service'