[DevTools Bug] Cannot add node "909" because a node with that id is already in the Store.

[IvanGoranov02]

Website or app

Error

Repro steps

Cannot see

How often does this bug happen?

Every time

DevTools package (automated)

react-devtools-extensions

DevTools version (automated)

6.1.1-44c3d3d665

Error message (automated)

Cannot add node "909" because a node with that id is already in the Store.

Error call stack (automated)

at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1192232
    at v.emit (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1160378)
    at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1161985
    at bridgeListener (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1572692)

Error component stack (automated)

GitHub query string (automated)

https://api.github.com/search/issues?q=Cannot add node  because a node with that id is already in the Store. in:title is:issue is:open is:public label:"Component: Developer Tools" repo:facebook/react

[JOBAYERAHAMED00]

at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1192232
at v.emit (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1160378)
at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1161985
at bridgeListener (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1572692)

[csalazarPD]

same here! its happening

[vegerot]

+1 This started happening to me today.

[LennyLouis]

just happened now

[pranavmappoli]

Any updates ?

[rootlinux2]

Same issue here!

The error was thrown at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1192232 at v.emit (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1160378) at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1161985 at bridgeListener (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:1:1572692)

[aalexgabi]

Also running into this with "restart and profile" feature.

[zwift-mark]

same

[lucho20pt]

I ran into an error message, Cannot add node "1" because a node with that id is already in the Store, specifically when trying to use the "Reload and start profiling" feature in React DevTools while on dynamic board page (app/(kanban)/board/[id]/page.tsx).

At first, I thought it might be because i was setting an HTML id attribute inside (components/kanban/list/list-card.tsx) which could potentially lead to duplicates if multiple lists had the same ID.

However, i found this GitHub issue where others reported the exact same error with the DevTools profiler, suggesting it's likely a bug within the DevTools extension itself.

Fix

Interestingly, i managed to fix it by switching my development command from next dev --turbopack to next dev, and then switching back.
Even after i put the HTML id back again (just to test if it was causing the issue), the profiler kept working.

This suggests the real fix was toggling the dev server, which probably cleared some temporary cache or state that was causing the conflict between Turbopack and the DevTools profiler.

So, it looks like it was a temporary tooling glitch rather than a bug in my code!

[janvorwerk]

For me, switching off reactStrictMode was enough to avoid these issues

-- edit => unfortunately this came back even with strict mode turned off! 😭

[milan-lakhani]

I Just had this issue right now :(