Read an Inertia 409 after deploy

Inertia uses 409 when the asset version changed. The client reloads. It is not a validation error.

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Read https://laravel-vuejs.space/inertia-error-409-vue.md
Inertia uses 409 when the asset version changed. The client reloads. It is not a validation error.
Do not abort(409) from a controller to mean "this record changed".
Do not disable the version check to silence a bad deploy.
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On this page · 3 sections
  1. The fix
  2. What to avoid
  3. FAQ

People searching “Inertia 409” treat it like a form error. A 409 from Inertia’s middleware means the asset version in the browser does not match the server. That happens after a deploy. The client sees X-Inertia-Location and does a full page load. The deploy guide is the release. This page is the status code.

TL;DR

  • Inertia uses 409 when the asset version changed.
  • The client reloads.
  • It is not a validation error.
  • Do not abort(409) from a controller to mean “this record changed”.

Who it's for: Laravel + Vue developers on Inertia

Applies to: Laravel 13 · Inertia 3 · Vue 3

The fix#

You do not catch it in onError and print form.errors. There is no field. The reload is the fix. If every visit is a 409, the version is not stable: public/build/manifest.json is missing, or two servers are building different assets behind one URL.

What to avoid#

Gotcha

Do not abort(409) from a controller to mean “this record changed”. Inertia already uses 409 for the asset version, and the client will reload instead of showing your sentence. A stale form belongs in the error bag. Do not disable the version check to silence a bad deploy.

FAQ#

What does an Inertia 409 after a deploy mean?

Inertia uses 409 when the asset version changed. The client reloads. It is not a validation error.

What goes wrong with Inertia 409?

Many developers treat it like a form error. Do not abort(409) from a controller to mean "this record changed".

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