Hey there! Thanks for asking.
A port is against the spirit of a game jam.
Submitting a pre-existing game would result in a disqualification, even if said game was rebuilt from the ground up.
Just to be safe, could you clarify what you mean by this post? How much of your submitted game would be “ported” from the old one?
OR are you just looking for permission to use existing assets?
Hope this helps, let me know if you have anymore questions.