
After deleting a Jira-User the Insight-User has the - seen as above - broken property.
Trying to change the User per API will now fail constantly with following error:
`Status code: BadRequest / Reason: / Body: {"errorMessages":[],"errors":{"rlabs-insight-attribute-205":"Benutzer (JIRAUSER14019) nicht in Jira gefunden"}}`
The solution is to edit the Insight-User and null/clear the corresponding field. Which is cumbersome.