SAP Message V1042 - Sales document &1 is currently being processed (by user &2)

V1042 : Sales document &1 is currently being processed (by user &2)

208192Causes for message V1042 when creating sales orders
1257803Incorrect locking behavior in backorder processing
506946Short dump "MESSAGE_TYPE_X" when posting goods movements
160524Error V1042 after Note 135262
703086Scenario A: Problems with activated filter