diff --git a/README.md b/README.md
index 9eef64c7..8e1756e0 100644
--- a/README.md
+++ b/README.md
@@ -287,6 +287,21 @@ Otherwise, default is all channels
 In case we have a new word detection logic, we must re apply it to all saved keywords inside our database.
 
 We should use env variable `UPDATE`  like in docker compose (should be set to "true")
+
+In order to see actual change in the local DB, run the test first `docker compose up test` and then these commands :
+```
+docker exec -ti quotaclimat-postgres_db-1 bash
+psql -h localhost --port 5432 -d barometre -U user
+--> enter password : password
+UPDATE keywords set number_of_keywords=1000 WHERE id = '71b8126a50c1ed2e5cb1eab00e4481c33587db478472c2c0e74325abb872bef6';
+UPDATE keywords set number_of_keywords=1000 WHERE id = '975b41e76d298711cf55113a282e7f11c28157d761233838bb700253d47be262';
+```
+
+After having updated `UPDATE` env variable to true inside docker-compose.yml and running `docker compose up mediatree` you should see these logs : 
+```
+ update_pg_keywords.py:20 | Difference old 1000 - new_number_of_keywords 0
+```
+
 ### Fix linting
 Before committing, make sure that the line of codes you wrote are conform to PEP8 standard by running:
 ```bash
diff --git a/docker-compose.yml b/docker-compose.yml
index 30c7f125..272fb59e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -136,7 +136,7 @@ services:
       POSTGRES_PORT: 5432
       PORT: 5050 # healthcheck
       HEALTHCHECK_SERVER: "0.0.0.0"
-      SENTRY_DSN: prod_only
+      # SENTRY_DSN: prod_only
       # START_DATE: 1704576615 # to test batch import 
       # UPDATE: "true" # to batch update PG 
       # CHANNEL : fr3-idf # to reimport only one channel
diff --git a/quotaclimat/data_processing/mediatree/update_pg_keywords.py b/quotaclimat/data_processing/mediatree/update_pg_keywords.py
index 2817b299..30f80efd 100644
--- a/quotaclimat/data_processing/mediatree/update_pg_keywords.py
+++ b/quotaclimat/data_processing/mediatree/update_pg_keywords.py
@@ -15,11 +15,13 @@ def update_keywords(session: Session, batch_size: int = 50000) -> list:
     for i in range(0, total_updates, batch_size):
         batch_updates = saved_keywords[i:i+batch_size]
         for keyword_id, plaintext, keywords_with_timestamp, number_of_keywords, start in batch_updates:
-            logging
             new_number_of_keywords = count_keywords_duration_overlap_without_indirect(keywords_with_timestamp, start)
-            logging.debug(f"{keyword_id} new value {new_number_of_keywords}")
-            update_number_of_keywords(session, keyword_id, new_number_of_keywords)
-
+            if(number_of_keywords != new_number_of_keywords):
+                logging.info(f"Difference old {number_of_keywords} - new_number_of_keywords {new_number_of_keywords}")
+                logging.debug(f"{keyword_id} new value {new_number_of_keywords}")
+                update_number_of_keywords(session, keyword_id, new_number_of_keywords)
+            else:
+                logging.debug("No difference")
         logging.info(f"bulk update done {i} out of {total_updates}")
         session.commit()