https://userapps.support.sap.com/sap/support/knowledge/en/3679861
3679861 - Error "Changing the work schedule day model is not possible due to Temporary Time...
You are using report ECTIM_TRANSFER_WSR_TO_EC or transaction ECTIM_TRANSFER_WSR to transfer Work Schedule Objects from SAP ERP HCM or S/4HANA to SuccessFactors...