Solution : https://service.sap.com/sap/support/notes/395100 (SAP Service marketplace login required)
Key words : 
additional key words ehs27bsp01ih, entire componentwith report rehs_xpra_upd_persgrp_to_27b, prerequisites causefield person group, attached correction instructions, run report rehs_xpra_upd_persgrp_to_27b, person group, conversion report, person data, symptom component, industrial hygiene
Related Notes : 
       
| 414724 | PersonGrp reqd entry field for person actng in amount dialog | 
| 394519 | Installation of SAP EH&S 2.7B/4.5B | 
| 393855 | Installing SAP EH&S 2.7B/4.6C | 
| 392841 | Installation of SAP EH&S 2.7B/4.6B | 
| 391318 | EH&S 2.7B corrections: Support Package 01 |