Postupdate rules are executed subsequent to a successful database update on the add or edit screen.
In regular use, you should not attempt to update the current issue that was just updated within a postupdate directive. In normal usage, you will use this directive to conduct updates to other issues following the conclusion of an add or update to an issue. For example, you might want to use an ADD, COPY, or an UPDATE action that links to other issues once you have successfully performed the update to the current issue.
Attempting to use this directive on the current issue will most often lead to a recursive update, where the postupdate will make a change to the current issue, and this will then lead to the same postupdate directive being executed, and this sequence being repeated an infinite number of times.
