Probably yes, but read your current contract to figure out the answer.
It probably has a term saying (something like) they can chuck you out at a month's notice. So if you refuse to sign the new contract, you'll be given your one month notice of termination.
Presumably you are accustomed to the massive raft of rights afforded to people renting houses and flats and imagined equivalent rights existed for boaters? Sadly, well actually no not sadly, this is not the case. Thank goodness. If it were, few marinas would ever accept anyone living aboard. Above or below the radar.