accounting document with movement type 511 s4hana

Dears, i made GR with movement type 511 and as far as i know it should post material document only and no accounting document , but the case is here is material document posted and also accounting document posting with value ZERO , no value posted to the inventory account but there is entry i do not why is it happened any idea to prevent this behavior. kindly note i use S4Hana 1610 and also material ledger is active.