011852d091
FIELDS[field] walked the prototype chain, so field=__proto__ (or
constructor, hasOwnProperty, etc.) resolved to a truthy inherited value
whose .key was undefined. Prisma drops undefined filter values, so
deleteMany({ where: { key: undefined } }) collapsed to deleteMany({}),
wiping the entire Config table. Guard with an own-property check before
indexing FIELDS so only real allowlist entries pass.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>