Clone job
From Protemos Wiki
You can clone a job by pressing the "Clone" button on the Jobs tab of the related project or right on the job page:
It will open the New job page where you can select files for this job, change service, vendor, etc., if necessary.
Having changed variables, set the required deadline and press "Create":
Note: The Language pair and Vendor fields cannot be changed if the job is not in the Draft status, and\or it has payables that are linked to the current vendor.
So in this case, to be able to change the assigned vendor and language pair, you should delete payables and\or change the job status.