[rules-users] Unique events / facts in working memory

[Justin King]

I'm building an application that will over time record changes in a certain
component (not at any set interval, could occur any time). The component can
possibly be uniquely identified via some kind of id. Is there a way that
when I insert an event / fact recording a change of state in this component
I can remove the previous one, so as there is only ever one fact / event
recording the current state of the component. If the previous one existed it
may cause rules to fire which should not.

Cheers,

Justin
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