Describe the Bug

I get this error when using read replicas. Cannot use 'in' operator to search for '_rels' in undefined.
The error shows up when I try to log in, and occasionally when for scripts (used outside nextjs).
It only happens when I use read replica.

I found this code to be the most likely cause of the error.
It turns out, in some cases data is undefined, but the type hinting does not account for that.
For example: in payload/packages/drizzle/src/upsertRow/index.ts

Link to the code that reproduces this issue

https://github.com/sam-gab/payload/tree/main

Reproduction Steps

• Add a read replica to your database config
• Try to login to payload or perform some high-volume (10-20 req/sec) ingestion task.

Which area(s) are affected? (Select all that apply)

drizzle

Environment Info

Relevant Packages:
  payload: 3.44.0
  next: 15.2.4
  @payloadcms/db-postgres: 3.44.0
  @payloadcms/email-nodemailer: 3.44.0
  @payloadcms/email-resend: 3.44.0
  @payloadcms/graphql: 3.44.0
  @payloadcms/live-preview: 3.44.0
  @payloadcms/live-preview-react: 3.44.0
  @payloadcms/next/utilities: 3.44.0
  @payloadcms/plugin-cloud-storage: 3.44.0
  @payloadcms/richtext-lexical: 3.44.0
  @payloadcms/storage-s3: 3.44.0
  @payloadcms/translations: 3.44.0
  @payloadcms/ui/shared: 3.44.0
  react: 19.0.0
  react-dom: 19.0.0