1366 - Incorrect integer value: '' for column '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', 'lsng1g3m2es7ad7bgrrjma58n6', '54.80.83.123', '1537840642', '1537840642', '/catalog/shopping_cart.php?osCsid=tkllj2luq5v5bm7ct837nnk6a0')

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