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', 't9ic8db8cr88qe1v2ktms6i9g4', '54.162.118.107', '1539767243', '1539767243', '/catalog/default.php?cPath=52_190&osCsid=tkllj2luq5v5bm7ct837nnk6a0')

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