Fix duplicate assessments

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/coredata/migrations/20260209T125649Z.sql

@@ -0,0 +1,33 @@
+DELETE FROM processing_activity_data_protection_impact_assessments
+WHERE id IN (
+    SELECT id
+    FROM (
+        SELECT id,
+               ROW_NUMBER() OVER (
+                   PARTITION BY processing_activity_id, COALESCE(snapshot_id, '')
+                   ORDER BY updated_at DESC
+               ) AS rn
+        FROM processing_activity_data_protection_impact_assessments
+    ) t
+    WHERE rn > 1
+);
+
+DELETE FROM processing_activity_transfer_impact_assessments
+WHERE id IN (
+    SELECT id
+    FROM (
+        SELECT id,
+               ROW_NUMBER() OVER (
+                   PARTITION BY processing_activity_id, COALESCE(snapshot_id, '')
+                   ORDER BY updated_at DESC
+               ) AS rn
+        FROM processing_activity_transfer_impact_assessments
+    ) t
+    WHERE rn > 1
+);
+
+CREATE UNIQUE INDEX processing_activity_dpias_processing_activity_id_snapshot_id_uniq
+    ON processing_activity_data_protection_impact_assessments (processing_activity_id, COALESCE(snapshot_id, ''));
+
+CREATE UNIQUE INDEX processing_activity_tias_processing_activity_id_snapshot_id_uniq
+    ON processing_activity_transfer_impact_assessments (processing_activity_id, COALESCE(snapshot_id, ''));