https://userapps.support.sap.com/sap/support/knowledge/en/3148303
3148303 - SE54 | SE11 | SV348 | User xxx is already processing SAPLZxxx 0001 Message no. SV348 |...
User xxx is already processing SAPLZxxx appears in the status line for a maintenance dialog in customer name space. In transaction SM12 3 lock entries for...