When editing Profit Center master data with App Manage Profit Centers, you find the field "Segment" is a mandatory field. If you don't fill in this field and save, you will get error "Enter a Segment".
SAP S/4HANA Cloud
Reproducing the Issue
Edit Profit Center master data with App Manage Profit Centers.
It's determined by Document Splitting configuration for whether Segment field is mandatory in Profit Center master data.
Go into SSCUI configuration ID 102322 (Document Splitting Characteristic for General Ledgers). Deselect flags "Zero balance" & "Mandatory Field" for "SEGMENT Segment". Save.
After this, the Segement field will not be mandatory field.
GL accounting, F3516, F1444 , KBA , fac_mpc_pctr016 , fac_mpc_pctr 016 , enter a segment. , CO-FIO , Fiori UI for Overhead Cost Controlling , Problem