@yurie @ilovegiyuunsabi @manga @mammt69wgf @zed-shadow @nimbuslovin @belsie @te-amo-mi-vida @hipnagogia @chloewasnothere

Step 2 — Unpack prefab completely (this is the most common “Detach didn’t stick” cause)
If your avatar is a prefab/prefab variant:
Select the avatar in the Hierarchy.
Inspector → Prefab section → Unpack Prefab Completely
Now remove Pipeline Manager again (or click Detach Blueprint ID).
Save the scene (Ctrl/Cmd+S).
Upload.

Step 3 — Hard reset by removing the component entirely
Do this on the avatar root:
Remove the Pipeline Manager component (delete it).
Save scene.
Close and reopen Unity (important; forces serialization refresh).
Open VRChat SDK → Show Control Panel → Builder → Upload again.

Step 4 — Confirm you’re not in Prefab Mode when uploading
If you opened the prefab asset (blue bar at top of Scene view), uploading can behave weirdly.
Exit Prefab Mode back to the scene.
Upload from the scene instance.

Step 5 — If it still persists: clean SDK state
Check Console for red errors above the “id is not allowed…” line. Fixing the first red error can resolve the ID failure.
Reimport VRChat SDK cleanly:
Delete the SDK folder(s) you imported (commonly Assets/VRCSDK and Packages/com.vrchat.* depends on install method).
Reinstall the SDK via the official Creator Companion (preferred).
Reopen project and try upload again.

@yurie @ilovegiyuunsabi @manga @mammt69wgf @zed-shadow @nimbuslovin @belsie @te-amo-mi-vida @hipnagogia @chloewasnothere