diff --git a/extract/padelnomics_extract/src/padelnomics_extract/playtomic_tenants.py b/extract/padelnomics_extract/src/padelnomics_extract/playtomic_tenants.py
index ea95eca..f275990 100644
--- a/extract/padelnomics_extract/src/padelnomics_extract/playtomic_tenants.py
+++ b/extract/padelnomics_extract/src/padelnomics_extract/playtomic_tenants.py
@@ -77,6 +77,10 @@ def extract(
     year, month = year_month.split("/")
     dest_dir = landing_path(landing_dir, "playtomic", year, month)
     dest = dest_dir / "tenants.jsonl.gz"
+    old_blob = dest_dir / "tenants.json.gz"
+    if dest.exists() or old_blob.exists():
+        logger.info("Already have tenants for %s/%s — skipping", year, month)
+        return {"files_written": 0, "files_skipped": 1, "bytes_written": 0}
 
     proxy_urls = load_proxy_urls()
     next_proxy = make_round_robin_cycler(proxy_urls) if proxy_urls else None
diff --git a/transform/sqlmesh_padelnomics/models/staging/stg_playtomic_opening_hours.sql b/transform/sqlmesh_padelnomics/models/staging/stg_playtomic_opening_hours.sql
index 42e7bf9..b6d6bcc 100644
--- a/transform/sqlmesh_padelnomics/models/staging/stg_playtomic_opening_hours.sql
+++ b/transform/sqlmesh_padelnomics/models/staging/stg_playtomic_opening_hours.sql
@@ -104,3 +104,6 @@ SELECT
 FROM unpivoted
 WHERE opening_time IS NOT NULL
   AND closing_time IS NOT NULL
+-- Enforce grain: if both old blob and new JSONL exist for the same month,
+-- the UNION ALL produces duplicate (tenant_id, day_of_week) pairs — deduplicate.
+QUALIFY ROW_NUMBER() OVER (PARTITION BY tenant_id, day_of_week ORDER BY tenant_id) = 1
diff --git a/transform/sqlmesh_padelnomics/models/staging/stg_playtomic_resources.sql b/transform/sqlmesh_padelnomics/models/staging/stg_playtomic_resources.sql
index b6f6353..6c9484f 100644
--- a/transform/sqlmesh_padelnomics/models/staging/stg_playtomic_resources.sql
+++ b/transform/sqlmesh_padelnomics/models/staging/stg_playtomic_resources.sql
@@ -68,3 +68,6 @@ SELECT
 FROM unnested
 WHERE (resource_json ->> 'resource_id') IS NOT NULL
   AND (resource_json ->> 'sport_id') = 'PADEL'
+-- Enforce grain: if both old blob and new JSONL exist for the same month,
+-- the UNION ALL produces duplicate (tenant_id, resource_id) pairs — deduplicate.
+QUALIFY ROW_NUMBER() OVER (PARTITION BY tenant_id, resource_json ->> 'resource_id' ORDER BY tenant_id) = 1