Table shows id (auto-increment) is 0 in all rows
The problem is that you can not create AUTO_INCREMENT without a key so try something like this:

CREATE TABLE `project_application` (
`id` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
`project_title` varchar(255) NOT NULL,
`project_id` int(11) NOT NULL,
`team_leader` varchar(255) NOT NULL,
`team_member` text,
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE     CURRENT_TIMESTAMP,
`createt_et` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00'
) 


Hope this helps