Astro.response.headers must not be reassigned.

import DontEditWarning from '~/components/DontEditWarning.astro'

<DontEditWarning />

AstroResponseHeadersReassigned: Individual headers can be added to and removed from Astro.response.headers, but it must not be replaced with another instance of Headers altogether.

What went wrong?

Thrown when a value is being set as the headers field on the ResponseInit object available as Astro.response.