I have a board (Board1) that when a Jira is created and a specific tag value is added, then a ticket is raised on a separate board (Board2), copying over some of the data from Board1 setting it as a Related issue of 'Linked issues' with a Link types of 'blocks'.
Sometimes, the user forgets to add the relevant label so they do this afterwards once the Board1 ticket has been created. This also works and creates a ticket on Board2 and links this to the ticket on Board1 as per above.
But if someone else adds a different label, then sometimes another ticket gets created on Board2 with a new number, duplicating the original Board2 ticket.
This is the Rule:

Not sure if I need to Re-fetch part but basically I'm trying to say do not create Board2 ticket if one already exists.