Solution : https://service.sap.com/sap/support/notes/726104 (SAP Service marketplace login required)
Key words :
'enter' key select tab title, select tab title, se80 edit objects, unique document types, valid document categories, transaction se11 domain, creating badi implementations, undefined document type, call occurs independent, document type
Related Notes :
| 151354 | Editor lock in SAP Includes |