Microsoft Sync Framework and Integer as Identifier

I've got to implement data synchronization between a loc开发者_开发问答al storage that resides on a mobile device and the server DB.

The thing is that our DB (which is already in production for many years) all uses an integer as the Id of a record. I'm afraid that changing it to be a GUID is currently not an alternative because it has too many repercussion.

Does someone has a good workaround this issue?

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See the following article 'Creating Primary Keys Across Databases' for some ideas.