How does the Wrangler update to V2 affect already built Workers?

Hi, we received an email about the Wrangler update from v1 to v2. We have a Worker and and I was wondering how this update affects already built Workers. How can I determine which Wrangler version it was built with and is it necessary to update the project?

If you have @cloudflare/wrangler then you are using wrangler 1 and if you are using wrangler then you are fine.

You can also check out the migration guide

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