Updating Trunk project on TWC from local project

Hi Team,

I have a quick question if someone has any input on this information.
I have 3 project versions. 

1- One project is Trunk on TWC and one I have saved locally.  The one is on TWC is more advanced forward versions. If I want to update the trunk on twc from the local model will I be losing the job that has been done on TWC? 

Thank you,

Drita