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', '917lhvmf5c3mdanjkvf5iqgdj4', '54.162.159.33', '1537510774', '1537510774', '/catalog/product_info.php?products_id=431&osCsid=t2t0ami1ie3s69bp1j36r92p81')

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