`phase/new` should not be applied if an existing phase label exists

[wooorm]

Initial checklist

• [x] I read the support docs
• [x] I read the contributing guide
• [x] I agree to follow the code of conduct
• [x] I searched issues and couldn’t find anything (or linked relevant results below)

Affected packages and versions: n/a

Steps to reproduce

https://github.com/syntax-tree/unist-util-visit-parents/pull/10#event-5065026500

Expected behavior

No confusion

Actual behavior

confusion

[github-actions[bot]]

Hi! This was closed. Team: If this was fixed, please add phase/solved. Otherwise, please add one of the no/* labels.