How to prevent channels with the same name from being created?

I expected that 2 calls to conversations.create at the same time would get one of them to fail, but instead 2 channels were created with the same name and different IDs. If I later try to make a 3rd call it fails with name_taken.

Packages:

Select all that apply:

• @slack/web-api
• @slack/rtm-api
• @slack/webhooks
• @slack/oauth
• @slack/socket-mode
• @slack/types
• I don't know

Reproducible in:

The Slack SDK version

6.8.1

Node.js runtime version

18.12.1

OS info

ProductName: macOS
ProductVersion: 12.5.1
BuildVersion: 21G83
Darwin Kernel Version 21.6.0

Steps to reproduce:

You can run this code:

		const results = await Promise.all([
			client.conversations.create({token, name: 'duplicated-channel-name2', validate: true}),
			client.conversations.create({token, name: 'duplicated-channel-name2', validate: true})
		]);

and inspect results

Expected result:

An error on one of the calls.

Actual result:

Both calls generated channels with the same name but different IDs. A later third call succeeded again but the fourth failed with name_taken.

Requirements

/

Start by running the Promise.all reproduction with @slack/web-api 6.8.1 on Node.js 18.12.1 and inspect the returned results. Compare concurrent and sequential conversations.create calls to establish the name_taken behavior; done means determining whether the behavior is in the SDK or Slack API and documenting the confirmed outcome.