Doesn't work with openstreetmap-carto @ b86de31 anymore (psycopg2 incompatibility)

[gy-mate]

Due to gravitystorm/openstreetmap-carto#4447 that was resolved after commit b86de31.

I get the following error when I run make.sh:

[...]
Downloading external datasets...
INFO:root:Checking table simplified_water_polygons
Traceback (most recent call last):
  File "/Users/███/Downloads/osm-mapping-party-before-after/openstreetmap-carto/./scripts/get-external-data.py", line 108, in index
    cur.execute('''VACUUM ANALYZE "{temp_schema}"."{name}";'''
    ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                .format(name=self._name, temp_schema=self._temp_schema))
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
psycopg2.errors.ActiveSqlTransaction: VACUUM cannot run inside a transaction block


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/███/Downloads/osm-mapping-party-before-after/openstreetmap-carto/./scripts/get-external-data.py", line 294, in <module>
    main()
    ~~~~^^
  File "/Users/███/Downloads/osm-mapping-party-before-after/openstreetmap-carto/./scripts/get-external-data.py", line 284, in main
    this_table.index()
    ~~~~~~~~~~~~~~~~^^
  File "/Users/███/Downloads/osm-mapping-party-before-after/openstreetmap-carto/./scripts/get-external-data.py", line 111, in index
    self._conn.autocommit = old_autocommit
    ^^^^^^^^^^^^^^^^^^^^^
psycopg2.ProgrammingError: set_session cannot be used inside a transaction

I have the latest version of psycopg2 installed (2.9.10).