Have a workaround for this
Export the job with whichever version you wish as folder wise by saving using "Select root directory" ( You can also save as zipped format too, if you file is big").
Go to the folder location in m/c and drill down till you get into the Process folder to see .item,.properties and .screenshot file.
You need to edit the properties file to change the name to have the new job name in 2 places Label and Process ref
And version in 1 place as 0.1 or which you would like. Save it
And reimport the Job to the repository.(see you don't have any jobs already existing with the new job name in the repository or recycle bin)
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Find out how to migrate from one database to another using the Dynamic schema