diff --git a/aidbox_python_sdk/db_migrations.py b/aidbox_python_sdk/db_migrations.py
index fbb47be..45c46df 100644
--- a/aidbox_python_sdk/db_migrations.py
+++ b/aidbox_python_sdk/db_migrations.py
@@ -20,6 +20,26 @@
         "sql": """
 DROP FUNCTION IF EXISTS drop_before_all(integer);
 
+CREATE FUNCTION drop_before_all(integer) RETURNS VOID AS $$
+declare
+e record;
+BEGIN
+FOR e IN (
+  SELECT table_name
+  FROM information_schema.columns
+  WHERE column_name = 'txid' AND table_schema = 'public' AND table_name NOT LIKE '%_history'
+) LOOP
+    EXECUTE 'DELETE FROM "' || e.table_name || '" WHERE txid > ' || $1 ;
+END LOOP;
+END;
+
+$$ LANGUAGE plpgsql;""",
+    },
+    {
+        "id": "20251126_fix_drop_before_all_for_history_resources",
+        "sql": """
+DROP FUNCTION IF EXISTS drop_before_all(integer);
+
 CREATE FUNCTION drop_before_all(integer) RETURNS VOID AS $$
 declare
 e record;