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', '6karb9qirunfbvmffpd8dn2gc0', '54.161.116.225', '1539896942', '1539896942', '/catalog/password_forgotten.php?osCsid=ecmc9ia7uh3q1ifk454tm8c3r5')

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