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', 'rvht4qmr972hl8k1s8tfe73ee2', '54.156.51.193', '1537342976', '1537342976', '/catalog/login.php?osCsid=bps2164f6uj42d7jhaimau1fl4')

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