Suboxide
This wedding was one of those as Meagon said later in FH. She said this event was really needed for the backstory of Ryzom and was needed to go further with the whole story.
You can cancel a wedding event, and hold it elsewhere (perhaps even in secret), and it wouldn't (or shouldn't) have any impact on the storyline other than that the location of the wedding was different.
Would make the character story a bit more interesting than "they held their wedding at x and they lived happily ever after".
The writer for the events should forsee such cases and have backup plans. The entire story just cannot be dependent on the wedding on a specific location at a specific time of some irrelevant character proceeding without interruptions.
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Kaetemi