Data Center Designer - "Version" meaning #ProfitBricks

I've noticed there's a version number for each Datacenter. What is the meaning of this number?

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Every change made to a live virtual data center will increase the version number. This becomes very handy, in case you have multiple users, and two different users are loading the same VDC and try to apply changes to it. The user which provisions latest will receive an error that the version number has changed in the meantime, and his currently loaded network is outdated. We do not merge changes from user A and user B. The second user only decides either to overwrite the changes from the first user or reload the new network from the first user and reapply the changes he wanted to make. Changes made through API will also increase the version number of a specific VDC.