Something is wrong with that ticket. Not only aren't the odds right, I've never seen a prop of this type that mentions a particular team making the safety. The prop usually reads; "Will there be a safety during the game." And again, it wouldn't mention if the safety would be the first score. The prop would usually state, Will the first score be either a TD or FG or other."
The odds of a safety being the first score, and no less by a specific team would be astronomical. If a book ever posted odds of 50-1 on a prop like that, they'd be laughed at all over town.