If one team member of a team project uses the extent with AI on an audio clip, this clip becomes un-syncable. Even if you render and replace - there seems to be something in the clip that remains that still makes it not syncable. The user who actually made the clip will not notice it and other team members can even use the file until they exit the team project - they will not be able to open the project once left it.
The person who generated that Ai audio file will be unable to save as the team project, it will generate a sync error.
If you copy the project into a local project you can use the project again - even send it to the other members of the team it will work . Once you copy it again into a team project you will get a sync error can't be saved - if you remove that ai file it will work again.