kiro-cli error: File exists (os error 17)

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

macOS 26.1.0 (25B78)

### Expected behaviour

kiro-cli should start.

### Actual behaviour

I had Q Developer installed, updated to kiro-cli and I get "error: File exists (os error 17)"

```
❯ kiro-cli chat
error: File exists (os error 17)
```

### Steps to reproduce

`❯ curl -fsSL https://cli.kiro.dev/install | bash
Kiro CLI installer:

Downloading package...
✓ Downloaded and extracted
✓ Package installed successfully

🎉 Installation complete! Happy coding!

Next steps:
Use the command "kiro-cli" to get started!

```
$ kiro-cli

Welcome to Kiro CLI, let's get you signed in!

Press enter to continue to the browser or esc to cancel

Device authorized

Logged in successfully
error: File exists (os error 17)`
```

### Environment

```yaml

[q-details]
version = "1.20.0"
hash = "ac0d8dec437123a79962295fdad4122ef9642da3"
date = "2025-11-16T23:27:14.134786Z (3d ago)"
variant = "full"

[system-info]
os = "macOS 26.1.0 (25B78)"
chip = "Apple M3 Pro"
total-cores = 12
memory = "36.00 GB"

[environment]
cwd = "/Users/USER"
cli-path = "/Users/USER"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "iTerm 2"
install-method = "unknown"

[env-vars]
PATH = "/Users/USER/Library/pnpm:/Users/USER/.nvm/versions/node/v24.7.0/bin:/opt/homebrew/opt/ruby/bin:/opt/homebrew/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/opt/pmk/env/global/bin:/Applications/iTerm.app/Contents/Resources/utilities:/Users/USER/.local/bin"
QTERM_SESSION_ID = "26bc934bc54042889ba3bb6ca23c8d61"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.20.0"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"
```