The original reporter describes encountering this issue:
> When I want to remove myself from [a conversation with a user account who has been deleted], it says:
> Validation errors: - New thread member "PHID-USER-dcvzt53lyugukyivjyol" is not a valid user.
---
// Original Report //
Is there a way to delete Conpherence threads? At least a
```
./bin/remove destroy Z1
```
would be great, but maybe it should also be possible by UI.
I have a thread with a user who doesn't exist anymore. This thread shows up as "Unknown Object (User)" at my messages icon and at the Conpherence page. When I want to remove myself from the conversation, it says:
```
Validation errors: - New thread member "PHID-USER-dcvzt53lyugukyivjyol" is not a valid user.
```
This makes sense, so I would like to remove the whole thread.