Solution : https://service.sap.com/sap/support/notes/931863 (SAP Service marketplace login required)
Key words :
terms me51 me52 me51n me52n medcm 018 version deletion t16ce reason, error/warning message medcm018, symptom version management, import parameter 'i_revisionlist', function module 'me_changedoc_select', existing version, message medcm018, purchase requisition, completely undone, automatically undone
Related Notes :
| 829264 | ME52N: The changes could not be completely undone |
| 828726 | ME22N: Not all version-relevant changes were cancelled |