Bug Version Control Issues with Array with [SerializeReference]

My

MonoBehaviour

contains an array with

SerializeReference

attribute, two error messages might appear when select a prefab with this

MonoBehaviour

:

• The serialize array of [Serialize Reference] objects is missing entry for Refid -2
• [Worker0] Tried select unknown importer for id '-2' '00000000000000000000000000000000'

If save the project, version control will tell you there are many 'rid' changed in this prefab, and all variants of this prefab are changed too. It breaks version control totally.

Unity version: 2021.2.b10

 

I tried to make a simple example, but I don't know how to reproduce it. In our project, every time we open Unity or exit the play-mode then save the project, this problem will definitely occur. In version control you can see 'rid' changed.



This makes our team crazy. I can't send our project as an example, because the project uses some private packages that you can't access.

 

I had the same error, to fix it I had to:
- close Unity
- revert the broken IDs using a previous commit of GIT
- delete these folders: Library, Logs, Temp
- start Unity

 

I get the worker error after updating project from Unity 2020.3 to 2021.2.6, whenever opening a Prefab that has a .PSB or .PSB-derived prefab variant.

All of the PSBs were re-imported as part of the Unity 2021 upgrade process, I feel like maybe there is a re-import process I can run after tweaking some values to ensure they are imported in a way that Unity is happy with.

To clarify, this error:

[Worker0] Tried select unknown importer for id '-2' '00000000000000000000000000000000'

 

Sorry to necro this post but I'm getting this same behaviour, every time someone opens the project this happens, this rid keeps getting regenerated for some reason. Any bug ticket for it?