diff --git a/sync/signals.py b/sync/signals.py
index 221c2ce..58b2521 100644
--- a/sync/signals.py
+++ b/sync/signals.py
@@ -126,15 +126,17 @@ def save_model_log(users, model_operation, model_name, model_id, store_id):
 
     with transaction.atomic():
         for user in users:
-            if user.should_synchronize:
-                model_log = ModelLog()
-                model_log.user = user
-                model_log.operation = model_operation
-                model_log.model_name = model_name
-                model_log.model_id = model_id
-                model_log.store_id = store_id
-                model_log.device_id = device_id
-                model_log.save()
+            print(f'>>> create log for {user.username} : {model_operation} {model_name}')
+
+            # if user.should_synchronize:
+            model_log = ModelLog()
+            model_log.user = user
+            model_log.operation = model_operation
+            model_log.model_name = model_name
+            model_log.model_id = model_id
+            model_log.store_id = store_id
+            model_log.device_id = device_id
+            model_log.save()
 
         # print(f'ML users = {len(users)}')
     # existing_log = ModelLog.objects.filter(users__in=users, model_id=model_id, operation=model_operation).first()
@@ -249,6 +251,7 @@ def related_users(instance):
 
         # look in hierarchy
         related_instances = instance.related_instances()
+        print(f'related_instances = {related_instances}')
         related_users = [ri.related_user for ri in related_instances if isinstance(ri, BaseModel)]
         users.update(related_users)
 
diff --git a/sync/views.py b/sync/views.py
index cde9abc..787e286 100644
--- a/sync/views.py
+++ b/sync/views.py
@@ -106,7 +106,7 @@ class SynchronizationApi(HierarchyApiView):
             data = op.get('data')
             data_id = data.get('id')
             device_registry.register(data_id, device_id)
-            print(f'*** 1count = {device_registry.count()}')
+            # print(f'*** 1count = {device_registry.count()}')
 
             try:
                 print(f'{model_operation} : {model_name}, id = {data['id']}')
diff --git a/tournaments/services/tournament_registration.py b/tournaments/services/tournament_registration.py
index 6d01eb9..0233edb 100644
--- a/tournaments/services/tournament_registration.py
+++ b/tournaments/services/tournament_registration.py
@@ -6,6 +6,7 @@ from django.contrib import messages
 from ..utils.licence_validator import LicenseValidator
 from ..utils.player_search import get_player_name_from_csv
 from tournaments.models import PlayerRegistration
+from ..utils.extensions import is_not_sqlite_backend
 
 class TournamentRegistrationService:
     def __init__(self, request, tournament):
@@ -99,12 +100,13 @@ class TournamentRegistrationService:
             self.context['team_form'].cleaned_data
         )
 
-        self.email_service.send_registration_confirmation(
-            self.request,
-            self.tournament,
-            team_registration,
-            waiting_list_position
-        )
+        if is_not_sqlite_backend():
+            self.email_service.send_registration_confirmation(
+                self.request,
+                self.tournament,
+                team_registration,
+                waiting_list_position
+            )
 
         self.clear_session_data()
         self.context['registration_successful'] = True
diff --git a/tournaments/signals.py b/tournaments/signals.py
index ae6cbd1..48859cb 100644
--- a/tournaments/signals.py
+++ b/tournaments/signals.py
@@ -15,6 +15,8 @@ from tournaments.models import PlayerDataSource
 from shared.discord import send_discord_log_message, send_discord_failed_calls_message
 from datetime import datetime
 
+from .utils.extensions import is_not_sqlite_backend
+
 def generate_unique_code():
     characters = string.ascii_lowercase + string.digits
     while True:
@@ -64,7 +66,8 @@ def notify_team(team, tournament, message_type):
     if tournament.supposedly_in_progress():
         return
 
-    TournamentEmailService.notify_team(team, tournament, message_type)
+    if is_not_sqlite_backend():
+        TournamentEmailService.notify_team(team, tournament, message_type)
 
 @receiver(pre_delete, sender=TeamRegistration)
 def unregister_team(sender, instance, **kwargs):
diff --git a/tournaments/utils/extensions.py b/tournaments/utils/extensions.py
index 2b30e90..fed47b1 100644
--- a/tournaments/utils/extensions.py
+++ b/tournaments/utils/extensions.py
@@ -1,4 +1,5 @@
 import uuid
+from django.conf import settings
 
 def format_seconds(seconds):
     hours = int(seconds / 3600)
@@ -14,3 +15,7 @@ def plural_format(label, count):
 def create_random_filename(base_name, extension):
     random_string = str(uuid.uuid4())
     return f"{base_name}_{random_string}.{extension}"
+
+def is_not_sqlite_backend():
+    default_db_engine = settings.DATABASES['default']['ENGINE']
+    return default_db_engine != 'django.db.backends.sqlite3'
diff --git a/tournaments/views.py b/tournaments/views.py
index f18a369..1679a84 100644
--- a/tournaments/views.py
+++ b/tournaments/views.py
@@ -833,7 +833,7 @@ def my_tournaments(request):
 
     def filter_user_tournaments(tournaments):
         return [t for t in tournaments if t.team_registrations.filter(
-            playerregistration__licence_id__icontains=stripped_license,
+            player_registrations__licence_id__icontains=stripped_license,
             walk_out=False
         ).exists()]