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Fixed in 2023.1.X

Fixed in 2019.1.X, 2019.2.X

Duplicate in 2020.3.X



Found in





Issue ID




[AssetImporter] Updating existing AnimationClip import setting results in a new InternalID and lost references to the clip

Asset - Importers


How to reproduce:
1. Open the attached project ("")
2. Open Window -> Animation Events Test
3. Set the clip to "Take 001"
4. Press the "AddEvent" button

Expected results: AnimationClip's Internal ID remains the same and the reference to it remains
Actual results: AnimationClip's Internal ID changes and all references to it are lost

Reproducible with: 2019.4.0f1, 2019.4.38f1, 2020.3.9f1, 2021.2.0a1, 2021.2.0a14,
Not reproducible with: 2020.3.10f1, 2020.3.33f1, 2021.2.0a15, 2021.2.19f1, 2021.3.1f1, 2022.1.0f1, 2022.2.0a11

  1. Resolution Note (fix version 2023.1):

    Fixed in: 2023.1.0a3

Comments (2)

  1. Clay_More

    Aug 23, 2021 10:03

    Still reproducible on 2021.1.7f1

  2. abhimanyu-singh

    Mar 08, 2021 15:30

    It seems this issue is back in Unity v2019.4.x.
    We got the same issue with v2019.4.8f1 and v2019.4.21f1.

    Can you guys fix this in next release?

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