Solution : https://service.sap.com/sap/support/notes/1248460 (SAP Service marketplace login required)
Key words :
/sapapo/om_upgr_tstr_check reason, valid shift ends, terms time stream, resource time stream, time stream, /sapapo/resources_lc_create, night shift, system upgrade, system adds, stored entries
Related Notes :
| 1257293 | Notes regarding resource time stream, relevant for upgrade |