Field update before or after creation of an issue

For a particular case, I have the possibility to create a Jira issue and an Article for Known Errors

Jira Issue:

known error Article:

In this example I have create a Jira Issue and an Article for the case 00161455.
What I am struggling with is that the field Jira_Issue__c on the article (Knowledge object) needs to be update with the Jira Number (JIRA000659). Only a Jira Issue can be created before an article is created. Alternatively a Jira Issue can also be created after an article has been created. In both case the field Jira_Issue__c on Knowledge has to be updated with the Jira Number associated to the case (00161455)

If someone could give me the logic?

Thanks