必须要设置ID是怎么回事

### Error updating database.  Cause: java.sql.SQLException: Field 'id' doesn't have a default value
### The error may involve com.miaoshaproject.dao.UserPasswordDOMapper.insertSelective-Inline
### The error occurred while setting parameters
### SQL: insert into user_password      ( encrpt_password,                       user_id )       values ( ?,                       ? )
### Cause: java.sql.SQLException: Field 'id' doesn't have a default value
; ]; Field 'id' doesn't have a default value; nested exception is java.sql.SQLException: Field 'id' doesn't have a default value]