Step One- Look at how the field is set up in the database
Using the Devel module you can execute PHP code along the lines of this at
$a = CINC::init('Field')->machine_name('field_resource_access_rights')->read()->read_instance_for('node', 'resource');
Step Two - Apply changes in database to CINC code.
Step Three- Disable custom module and then re-enable custom module
*This is if you've defined content types in hook_enable()*