Can't seem to add any series

[Xonshiz]

I just ran into an issue where I can't seem to add any series in the database. It shows following error :

A Database Error Occurred  
Error Number: 1366  
Incorrect integer value: '' for column 'id' at row 1  

INSERT INTO `fs_comics` (`id`, `name`, `stub`, `uniqid`, `hidden`, `author`, `artist`, `description`, `customchapter`, `format`, `adult`, `created`, `creator`, `editor`) VALUES ('', 'testing', 'testing', '592eff650ca0e', 0, '', '', '', '', '0', 0, '', '1', '1')  

Filename: /libraries/datamapper.php  

Line Number: 1635

I was able to add the series just fine a few days ago. This suddenly came up. My Database is working just fine, I tried to repair the files (built-in function for FoOlSlide).

What's the issue here that's stopping the workflow?