Index: www/py-django111/files/patch-django_db_backends_sqlite3_schema.py
===================================================================
--- www/py-django111/files/patch-django_db_backends_sqlite3_schema.py	(nonexistent)
+++ www/py-django111/files/patch-django_db_backends_sqlite3_schema.py	(working copy)
@@ -0,0 +1,17 @@
+--- django/db/backends/sqlite3/schema.py.orig	2019-09-02 09:44:58.000000000 +0300
++++ django/db/backends/sqlite3/schema.py	2019-09-25 19:18:23.162005000 +0300
+@@ -24,12 +24,14 @@
+             c.execute('PRAGMA foreign_keys')
+             self._initial_pragma_fk = c.fetchone()[0]
+             c.execute('PRAGMA foreign_keys = 0')
++            c.execute('PRAGMA legacy_alter_table = ON')
+         return super(DatabaseSchemaEditor, self).__enter__()
+ 
+     def __exit__(self, exc_type, exc_value, traceback):
+         super(DatabaseSchemaEditor, self).__exit__(exc_type, exc_value, traceback)
+         with self.connection.cursor() as c:
+             # Restore initial FK setting - PRAGMA values can't be parametrized
++            c.execute('PRAGMA legacy_alter_table = OFF')
+             c.execute('PRAGMA foreign_keys = %s' % int(self._initial_pragma_fk))
+ 
+     def quote_value(self, value):