FieldError does not tell where it is stuck.

I corrected the spelling error published_date to published_date, but I still get this error.

And I don't know which file this is causing the error.I searched ctrl+f for all html under the templates folder, but I couldn't find it.

If I get this error, how can I find a file with that error?

By the way, only post_detail.html uses published_date in the template.