DELETE FROM activities_users WHERE date_modified > '2023-07-16 13:59:59' AND date_modified <=  '2023-08-01 13:59:59';
DELETE FROM activities_users WHERE date_modified > '2023-08-01 13:59:59' AND date_modified <=  '2023-08-16 13:59:59';
DELETE FROM activities_users WHERE date_modified > '2023-08-16 13:59:59' AND date_modified <=  '2023-09-01 13:59:59';
