event: Zoom CSV import — force registrant email as external_id; ignore placeholder Unique identifier

app/routers/event_badge_importing.py

@@ -574,17 +574,23 @@ async def event_id_badge_import_zoom_csv(
         if loop_count <= begin_at: continue
         if loop_count > end_at: break
 
-        unique_id = str(record.get('Unique identifier', '')).strip()
+        # Force use of Registrant email as the external_id for Zoom CSV imports.
+        # Many Zoom exports (for this group) have a useless "Unique identifier"
+        # column that contains "N/A" for every row — rely on email instead.
         email = str(record.get('Registrant email', '')).strip()
-
+        if not email:
-        if unique_id:
+            log.warning('Row missing registrant email — skipping.')
-            external_id = unique_id
-        elif email:
-            log.info('Using email as external_id fallback for Zoom CSV row')
-            external_id = email
-        else:
-            log.warning('Row missing Unique identifier and email — skipping.')
             continue
+        external_id = email
+
+        # Sanitize the Unique identifier value and only use it as the
+        # external_registration_id if it appears meaningful. Treat common
+        # placeholders like 'N/A'/'NA'/'UNKNOWN' as missing.
+        unique_id_raw = str(record.get('Unique identifier', '')).strip()
+        if unique_id_raw and unique_id_raw.upper() not in ('N/A', 'NA', 'UNKNOWN'):
+            external_registration_id = unique_id_raw
+        else:
+            external_registration_id = None
 
         ticket_name = str(record.get('Ticket name', '')).strip()
         given_name = str(record.get('First name', '')).strip()
@@ -625,7 +631,7 @@ async def event_id_badge_import_zoom_csv(
             'event_id': event_id,
             'enable': True,
             'external_id': external_id,
-            'external_registration_id': unique_id,
+            'external_registration_id': external_registration_id,
             'event_person_profile': {
                 'enable': True,
                 'given_name': given_name,
@@ -649,7 +655,7 @@ async def event_id_badge_import_zoom_csv(
             'event_badge': {
                 'enable': True,
                 'external_id': external_id,
-                'external_registration_id': unique_id,
+                'external_registration_id': external_registration_id,
                 'given_name': given_name,
                 'family_name': family_name,
                 'full_name': display_name or f'{given_name} {family_name}'.strip(),