Remove projectCategory from a Project

[Shay Cohen]

I am using Jira DC rest API, I am trying to remove projectCategory from a Project without assign another projectCategory to it.

In the cloud documentation, it is mentioned that for doing so we need to pass '-1' as the categoryId of relevant project but in DC it is not working.

[Pankaj Jangid]

In Jira Server/Data Center, removing a project category without assigning a new one is not directly possible through the REST API, unlike in Jira Cloud. This is because in Jira Server/Data Center, project categories are required for projects and cannot be null.