No Duplicate Sub-tasks should be formed

[Jira Billing]

I have a parent issue type: Service Request

It can have the following sub-tasks: CSR, PM, BUG, Infra, DevOps

Requirement: If a subtask is created of a particular type(say PM) the another subtask of that type(PM) should not be created though we can create some other type subtaks(aby from CSR,BUG,Infra,DevOps).

How to achieve this through any method: Automation, Transition Validators or any other methods.

[Trudy Claspill · Accepted solution]

Hello @Jira Billing 

Automation Rules can't be used to prevent an event from occurring. Automation Rules are triggered when a specified event has completed. An automation rule could be used to detect that an issue had two subtasks of the same type, but could not prevent the creation of the second subtask of the same type.

Natively Jira workflow customization does not provide a function that would enable you to check if a subtask of the same type already exists for the parent issue. There may be third party apps that would extend the workflow functionality to support that. Are you willing to consider getting a third party app?

[Jira Billing]

Thanks @Trudy Claspill

Could you suggest any third-party apps I can use to achieve this?

[Trudy Claspill]

You can find several workflow extension apps in the Atlassian Marketplace.

https://marketplace.atlassian.com/search?hosting=cloud&product=jira&query=workflow

I have not had to fulfill your specific need so I have not spent time researching them individually to see which for this specific use case.