# UE 5.6 Editor Crash When Redirectors Present in FMOD Import Folder

**URL:** <https://qa.fmod.com/t/ue-5-6-editor-crash-when-redirectors-present-in-fmod-import-folder/24006>\
**Category:** Unreal Engine\
**Tags:** ue5\
**Created:** [February 12, 2026, 12:39am UTC](https://qa.fmod.com/t/ue-5-6-editor-crash-when-redirectors-present-in-fmod-import-folder/24006 "2026-02-12T00:39:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![lmgarciac](https://avatars.discourse-cdn.com/v4/letter/l/8edcca/32.png) [@lmgarciac](https://qa.fmod.com/u/lmgarciac)\
**Post date:** [February 12, 2026, 12:39am UTC](https://qa.fmod.com/t/ue-5-6-editor-crash-when-redirectors-present-in-fmod-import-folder/24006/1 "2026-02-12T00:39:09Z")

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Hello support team!

Our team is having an issue when importing some Events.

If the FMOD generated banks have an event that needs to be imported in UE, i.e: Event → ThisEvent  
And for some reason the UE import folder happened to have a redirector with the same name i.e: Redirector → ThisEvent, the UE editor will crash and remain in a broken state with error:

Cannot replace existing object of a different class.

I’ve searched for this issue on the thread history and somebody had the exact same error:

> [@Deleting old banks completely](https://qa.fmod.com/t/deleting-old-banks-completely/23228):
>
> [image] Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 3639] Cannot replace existing object of a different class. New Object: /Script/FMODStudio.FMODEvent /Game/Sound/FMOD/Events/00\_SFX/07\_NonReverb/Global\_StartDeathMenu.Global\_StartDeathMenu Existing Object: /Script/CoreUObject.ObjectRedirector /Game/Sound/FMOD/Events/00\_SFX/07\_NonReverb/Global\_StartDeathMenu.Global\_StartDeathMenu (0x00280003 0x00004000) HI I did some res…

But I don’t see a solution on the thread, owner seems to have just found a workaround.  
The simplest workaround for this, is to just delete or resolve the redirectors, but we’re trying to find a more reliable, non-manual solution for this error.

Is this expected behavior? Or is there any sort of fix to avoid this state?

Thanks a lot for your help!

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**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\
**Post date:** [February 18, 2026, 4:20am UTC](https://qa.fmod.com/t/ue-5-6-editor-crash-when-redirectors-present-in-fmod-import-folder/24006/2 "2026-02-18T04:20:57Z")

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Thanks for reporting this, it seems to be an issue with the way we create/lookup our generated uassets which we are doing by string and should be doing by guid.

The only advice I can offer for this is to make sure to use the ‘fixup redirectors’ option after building banks containing renamed or moved objects.

We have a task to improve the way our integration handles the generated uassets, and possibly even removing them completely. But I cannot currently give an ETA on this.