Solution : https://service.sap.com/sap/support/notes/321496 (SAP Service marketplace login required)
Key words :
purchase requisitions --> define text types, additional key words me51n, redundant text type '05', enjoysap - purchase requisition, purchase requisition --> texts, text types, purchase requisition, transaction me51n, item texts, create/change
Related Notes :
| 353584 | ME51N, ME52N: problems with texts in PReq |
| 206840 | ME21N deleted text types are issued |