Below is my table structure
CREATE TABLE IF NOT EXISTS `physicians` ( `physician_id` bigint(20) NOT NULL AUTO_INCREMENT, `user_id` bigint(20) NOT NULL,
You have defined the not null value to 'physician_minc':
`physician_minc` varchar(20) NOT NULL,
How can you pass the null value to it.First you need to make the physician_minc column as null then only you can pass your desired null value.
physician_minc
`physician_minc` varchar(20) NULL,