The team could choose to revisit the scope of the project. If you can identify anything superfluous on the project schedule, you could notify project management to have it removed. In addition, any gold plating, which refers to adding extra features that are not necessary, should be eliminated, pushed to a later time, or reduced in scope.
If nothing obvious can be found, you could work with the appropriate stakeholders, such as domain experts, business analysts, end users, and product owners, to consider changing requirements. Lower-priority functionality could potentially be dropped or delayed until a future release.