1366 - Incorrect integer value: '' for column `ngtkeZ_web1104_2`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'qk3hm9i8k1oio8d45ohotar3d3', '100.24.113.182', '1606345841', '1606345841', '/content/en/Shipping-Returns.html')

[XT SQL Error]