Custom Domains Already Exist Issue

[kbarnesMCC]

Checklist

• I have looked into the README and have not found a suitable solution or answer.
• I have looked into the documentation and have not found a suitable solution or answer.
• I have searched the issues and have not found a suitable solution or answer.
• I have upgraded to the latest version of this tool and the issue still persists.
• I have searched the Auth0 Community forums and have not found a suitable solution or answer.
• I agree to the terms within the Auth0 Code of Conduct.

Description

Recently I have observed that the tool is no longer handling customDomains successfully; specifically in the sense that we get the following error:

2025-11-18T18:29:21.742Z - error: Problem running command import during stage processChanges when processing type customDomains

2025-11-18T18:29:21.742Z - error: Problem creating customDomains "<redacted>"

ManagementApiError: The specified custom domain already exists.

This started happening, as best as we can tell, after November 4th, 2025 as this was the last time our pipelines that manage our Auth0 ecosystem ran successfully. Today when we needed to do a tweak to Auth0, completely unrelated to our custom domain setup, we were presented with this error.

I noticed that 8.20.2 released functionality specific to custom domains; is it possible that this release caused what we're seeing?

Note that this doesn't happen for any of the 100+ other resources this tool supports that "already exist"; it's just for Custom Domains.

Expectation

Consistent behavior across all resources; if they already exist in Auth0 then the tool doesn't error out (e.g. just overwrites).

Reproduction

1. Given a custom domain setup and online in Auth0
2. Run the tool which has the equivalent custom domain configuration
3. Observe that the custom domain portion of the tool fails indicating the domain already exist

Deploy CLI version

8.20.3

Node version

24

[kbarnesMCC]

As an FYI, I've submitted Auth0 Support Case #02709066 in support of this issue as well.

[kushalshit27]

Thank you for reporting this issue! Our team is currently investigating the issue.

[jarkkojarvinen]

I noticed also same issue. Few things to add.

The pipeline works fine with version 8.20.1, but with version 8.20.2 end up to error:

2025-11-19T06:53:53.147Z - error: Problem running command import during stage processChanges when processing type customDomains
2025-11-19T06:53:53.147Z - error: There was an error trying to find the entity within paginate

And with version 8.20.3:

2025-11-19T06:51:56.713Z - error: Problem running command import during stage processChanges when processing type customDomains
2025-11-19T06:51:56.713Z - error: Problem creating customDomains "****"
ManagementApiError: The specified custom domain already exists.

[hdefensepoint]

same error here

[postsa]

Same here. It looks like this PR #1193 changed the response type of the handler to account for pagination and then only accounted for it in the test utilities, could that be the issue?

[kushalshit27]

The fix for this issue is now available in version 8.21.0. 🚀

Thank you for your patience! Feel free to reopen it if you encounter any further problems.

[kbarnesMCC]

Happy to confirm we're no longer seeing the issues in our pipeline. Thanks for the quick tunaround!