solved delete all active and cached form sessions

Keith Mauck
Keith Mauck
@keith-mauck
7 years ago
67 posts
What exactly happens when you reset this under Reset Caches?

"Check this box to delete all active and cached form sessions - any in-progress form submissions will need to be redone."
updated by @keith-mauck: 07/15/17 12:54:46PM
michael
@michael
7 years ago
7,744 posts
when you open a form, a form_key is set in the form. Its unique each time the form is displayed. This key is there when the form is displayed on your site, and is expected to be there when the filled in form is submitted. If its not you get an "invalid form_key error, please refresh and try again" type error.

If you reset the cache while someone is filling in a form, their key becomes invalid and the form submission will not be accepted.

The purpose of the key is to prevent form submissions coming from nasty people trying to trick the system into doing things its not supposed to do.

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