The data long for column error appears when registering after adding the optional registration function, but I don't think the data length is a problem.

"Yeonpung Industrial Co., Ltd.'s public home shopping release will be omitted." You're working so hard.

If the form causes a problem, you can find out the cause in the following order. No matter how bad you are, one of the following three is the problem.

+ If you submit the form using the check box, the following request body will be generated.

...&ckbox=187&ckbox=188&ckbox=189&...

According to the Mozilla Foundation, the server code should be converted into a list and processed.