we have some items with the meaning of costs (e.g. costs for repair hours, costs for Transportation). These items were created some time ago as Item Type "Purchased" and should now be corrected to "Costs".
tiitm0101m000 does not allow such a change, even if there were no bookings at all. But we have bookings, indeed.
So, the only way to correct would be ttaad4100.
What do you think?