There are two or more matching vfolders error

### What Operating System(s) are you seeing this problem on?

Linux (x86-64)

### Backend.AI version

https://github.com/lablup/backend.ai/commit/5b0fd42cb804da8030cc43aa9947a6985931999a

webui: https://github.com/lablup/backend.ai-webui/pull/2644

### Describe the bug

1. `admin@lablup.com` creates a folder

1. admin user shares folder with `domain-admin@lablup.com` with view permissions

1. domain-admin accepts the invitation.

1. Modify permissions to Edit+Delete

1. domain-admin deletes shared folder

1. This error occurs

But `user@lablup.com` doesn't get the error

and there don't seem to be any duplicate folder name.

### To Reproduce

_No response_

### Expected Behavior

_No response_

### Anything else?

_No response_

JIRA Issue: BA-90