Can't change the issue type

Question

System: Jira DataCenter 8.22

For most of our projects, I have issue types which share the same workflow, screen scheme & field configuration, and I can change the issue type in the detail screen. On one project, the issue types have the same screens, workflow and field configuration, yet I can't change the issue type in the detail screen. What am I missing?

Zia Butt · Answer

Configure the Screen you are using to add the "Issue Type" field to the Screen.

Jerry Miller_q228li · Answer

My issue was solved here. Apparently only this issue type uses a different screen that didn't have the issue type field for some reason:
https://community.atlassian.com/t5/Jira-questions/Cannot-edit-this-issue-type-in-this-project/qaq-p/1138619

Jerry Miller_q228li · Answer

Adding to OP.

I have the similar situation:  I have several issue types using the exact same workflow, issue screen, etc. There is no screen required on Edit. None of the options above are an issue.

I have move permission for the project and can convert other issue types by selecting the issue type icon and selecting the new issue type.

For some of the issue types in the same schemes, etc., I can convert using the icon, but at least one issue type I cannot convert using the icon (Bug).

What would cause one issue type of several to behave differently this way?