Deleted an application, but the tag sync remains, blocking me from recreating the app

Question

Hello,
I'm using myApplications to track various metrics, and uses tag sync.

Recently, I've deleted an application, then tried to recreate another one with the same tag sync. The UI is telling me that "This tag value is already used in a different application". However, this is not the case.

My guess is that the has been deleted, but not it's tag sync. I can indeed find, inside "Resource Groups", a saved resource group that should not exist anymore.
This resouce group cant be deleted in the Console (no Delete button), and using CLI, I get this: `An error occurred (ForbiddenException) when calling the DeleteGroup operation: Access denied. This group is managed by the service.`.

Please advise on how to clear data to be able to recreate the app+tag sync, without having to change the tags on all my resources.
Thanks,

re:Post Agent · Accepted Answer

I understand your frustration with this situation. It appears that you've encountered an issue where a tag-sync task is persisting even after deleting the associated application. This can indeed prevent you from recreating an application with the same tag key-value pair. Here's what you can do to resolve this issue:

1. First, try to cancel the existing tag-sync task. You can do this using the CancelTagSyncTask API operation. This operation requires the "resource-groups:CancelTagSyncTask" permission on the application group.

2. If canceling the tag-sync task doesn't work or you're unable to locate it, you may need to check the status of the tag-sync task using the GetTagSyncTask API. This will give you more information about the current state of the task, including whether it's in an ACTIVE or ERROR state.

3. If the tag-sync task is in an ERROR state, review the ErrorMessage returned by GetTagSyncTask for more information on how to resolve the issue.

4. In case you're still unable to delete the resource group or cancel the tag-sync task, you may need to contact AWS Support. They can help you resolve issues that are not accessible through standard API operations or the console.

5. For future reference, when deleting an application, ensure that you also cancel any associated tag-sync tasks before deletion to avoid this situation.

6. If you absolutely need to recreate the application immediately and can't wait for the above steps, you might consider using a slightly different tag key-value pair for the new application. However, this should be a last resort as it may require updating tags on your resources.

Remember, each application can support multiple tag-sync tasks, but each task must have a unique tag key-value pair. Also, there's a limit of 100 tag-sync tasks per account across all applications.

By following these steps, you should be able to clear the lingering tag-sync task and recreate your application without changing the tags on all your resources.  
**Sources**  
[Resolving tag-sync errors in myApplications - AWS Management Console](https://docs.aws.amazon.com/awsconsolehelpdocs/latest/gsg/sync-error.html)  
[CancelTagSyncTask - AWS Resource Groups](https://docs.aws.amazon.com/ARG/latest/APIReference/API_CancelTagSyncTask.html)  
[GetTagSyncTask - AWS Resource Groups](https://docs.aws.amazon.com/ARG/latest/APIReference/API_GetTagSyncTask.html)  
[StartTagSyncTask - AWS Resource Groups](https://docs.aws.amazon.com/ARG/latest/APIReference/API_StartTagSyncTask.html)

Deleted an application, but the tag sync remains, blocking me from recreating the app

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