diff --git a/src/context/service/database/OpticalConfig.py b/src/context/service/database/OpticalConfig.py
index c0236a0fe3ce5c4fdec59097c8fc5f58081365a0..ebe751ce6d1f3fd4b7b43c2ddfff0c2862c5f91c 100644
--- a/src/context/service/database/OpticalConfig.py
+++ b/src/context/service/database/OpticalConfig.py
@@ -223,9 +223,10 @@ def set_opticalconfig(db_engine : Engine, request : OpticalConfig):
                 stmt = stmt.returning(RoadmTypeModel.roadm_uuid)
                 roadm_id = session.execute(stmt).fetchone()
 
+                LOGGER.warning('channels={:s}'.format(str(channels)))
                 stmt = insert(ChannelModel).values(channels)
                 stmt = stmt.on_conflict_do_update(
-                    index_elements=[ChannelModel.channel_uuid ],
+                    index_elements=[ChannelModel.channel_uuid],
                     set_=dict(
                         band_name           = stmt.excluded.band_name,
                         lower_frequency     = stmt.excluded.lower_frequency,