插入报错，提示create_time为空，请问是哪里出了问题呢
into
homepage_course
(course_icon, course_intro, course_name, create_time, course_type, update_time)
values
(?, ?, ?, ?, ?, ?)
2020-07-09 14:19:24.643 WARN 1512 --- [ main] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 1048, SQLState: 23000
2020-07-09 14:19:24.644 ERROR 1512 --- [ main] o.h.engine.jdbc.spi.SqlExceptionHelper : Column 'create_time' cannot be null
