I want to create a non-global flag which each user can use to 'flag' one (and only one) instance of a specific content type.
I have a view which displays a list of content with fields, including a flag link. I would like to set up my flag (or a rule with a flag) so that if a user clicks on a flag link, all other flags that that user has set (for that specific flag type) are reset.
This will be used for a 'favorite' type of flag, which can only be set on one instance of a specific content type.