GWT Caching of files

I am having issues relating to GWT caching of files. if I roll out a new version of my application (via a war file deployed to my jetty server).  I am able to bring up chrome and everything looks ok.  But if I need to rollback the version (redeploy an older war file), then I get all sorts of serialization errors.

I am assuming this is because the new files in my browser cache take precedence over my reverted war files files.  Is there a way to avoid this?  Has anyone encountered this problem?

Thanks.

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