diff --git a/management/commands/import_nk15.py b/management/commands/import_nk15.py
index 519a1b5..12d7164 100644
--- a/management/commands/import_nk15.py
+++ b/management/commands/import_nk15.py
@@ -16,3 +16,4 @@ class Command(BaseCommand):
         call_command('import_activities', chunk=5000, map="map.json")
         call_command('import_transaction', chunk=5000, buttons=True, map="map.json")
         call_command('make_su','-sS', 'Coq', 'erdnaxe', 'PAC', 'Pollion', 'ÿnérant')
+        call_command('syncsql')
diff --git a/management/commands/syncsql.py b/management/commands/syncsql.py
new file mode 100644
index 0000000..92a908d
--- /dev/null
+++ b/management/commands/syncsql.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+
+from django.core.management.base import BaseCommand
+from django.apps import apps
+from django.db import connection
+
+
+from polymorphic.models import PolymorphicModel
+
+NO_SEQ = [
+    "Session",
+    "Token",
+    "WEIRole", # dirty fix
+]
+
+class Command(BaseCommand):
+    """
+    Command to synchronise primary sequence of postgres after bulk insert of django.
+    """
+
+    def add_arguments(self,parser):
+        parser.add_argument('apps', type=str,nargs='*',help='applications which table would be resynchronized')
+        return parser
+
+    def handle(self, *args, **kwargs):
+        app_list = kwargs["apps"]
+        if len(app_list):
+            model_classes = list()
+            for app in app_list:
+                model_classes += apps.get_app_config(app).get_models()
+        else:
+            # no app specified, sync everything
+            model_classes = apps.get_models(include_auto_created=True)
+
+        db_names = [ m._meta.db_table for m in model_classes if m.__base__.__base__ is not PolymorphicModel and m.__name__ not in NO_SEQ and m.objects.count()>1]
+        com = "BEGIN;\n"
+        for db_name in db_names:
+            com += f'SELECT setval(pg_get_serial_sequence(\'"{db_name}"\',\'id\'), coalesce(max("id"), 1), max("id") IS NOT null) FROM "{db_name}";\n'
+        com += "COMMIT;"
+        print(com)
+        cur = connection.cursor()
+        cur.execute(com)
+        cur.close()