WordPress database error: [Column 'first_name' cannot be null]
INSERT INTO `wp_book_form` (`first_name`, `last_name`, `e_mail`, `phone`, `adults`, `date_of_booking`, `tours_name`, `extra_mesg`, `amount`, `status`, `created`, `post_id`, `pay`) VALUES (NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, '0', '2019-03-16 00:58:55', NULL, '0')

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