EE 2.7/Channel Form/PHP Notices from Channel_form_lib.php

Question

Empty Channel Form on one of my channels throws the following notices/errors:

A PHP Error was encountered
Severity: Notice
Message: Undefined index: field_type
Filename: channel_form/Channel_form_lib.php
Line Number: 2742

A PHP Error was encountered
Severity: Notice
Message: Undefined index: field_type
Filename: channel_form/Channel_form_lib.php
Line Number: 2809

This is all that is in the open form tag:

{exp:channel:form channel="video" return="tell_your_story/thanks" }

Changing to a different channel removes the error

Answer 1

The cause was a checkbox field with a short name of 'sticky'. I needed this field as a workaround to keeping sticky entries on top when sorting randomly. Renamed it to 'stick_to_top' and errors went away.