You can only change the type of tasks in workbench requests

What causes this issue?

You can only use the function <LS>Change type</> for Workbench tasks.
Workbench tasks must have one of the following types:
Development/correction
Repair
Unclassified

System Response

The function terminates.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.