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', 'fegra07hg7jk3jfbv9d54h43j4', '54.80.83.123', '1537836566', '1537836566', '/catalog/product_info.php?products_id=755&osCsid=tkllj2luq5v5bm7ct837nnk6a0')

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