Key and Positions Import CSV - reuse for multiple people

I have downloaded the csv file to be used as an import for configuring keys and positions on a phone.

We have Polycom VVX 350s and I would like to reuse this csv file across a few dozen people.

I tried to just upload a file with keys 2 thru 6 because key one is already configured.

That was not acceptable, it wants Key 1.

How do I code the csv so it will not overwrite everyone's phone with my extension?

Is that possible, or do I need some other csv that will have everyone's phone on it and I have to configure every column for everyone before uploading?

I hope this makes sense.

Thank you!