Nprobe Collector Mode | OUT_BYTES and OUT_PKTS showing all zeros from all netflow exporter V5,V9,Sflow

i am using below mentioned command to run Nprobe in collector mode . all flows and its fields are received and store in Mysql db except Out_bytes and Out_Packets .

nprobe command

nprobe -i none -n none --collector-port 2055 -T "@NTOPNG@" --mysql="localhost:ntopng:usman:root:Cloud009.com"

mySQL result

22/Oct/2020 20:28:30 [database.c:339] [IN_BYTES][3000][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [IN_PKTS][10][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [PROTOCOL][6][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [L4_SRC_PORT][55003][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [IPV4_SRC_ADDR][3232235853][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [INPUT_SNMP][1][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [L4_DST_PORT][443][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [IPV4_DST_ADDR][3232235991][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [OUTPUT_SNMP][4][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [LAST_SWITCHED][1603380506][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [FIRST_SWITCHED][1603380506][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [OUT_BYTES][0][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [OUT_PKTS][0][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [SRC_VLAN][0][variable length=No]
22/Oct/2020 20:28:30 [database.c:440] [IN_SRC_MAC]['000000000000'][len=6][variable length=No]
22/Oct/2020 20:28:30 [database.c:440] [OUT_DST_MAC]['000000000000'][len=6][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [IP_PROTOCOL_VERSION][4][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [CLIENT_TCP_FLAGS][0][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [SERVER_TCP_FLAGS][0][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [L7_PROTO][91][variable length=No]
22/Oct/2020 20:28:30 [database.c:339] [L7_PROTO_RISK][0][variable length=No]

Start by reproducing the collector-mode command with the listed NetFlow V5, V9, or sFlow exporters and inspect the MySQL output for OUT_BYTES and OUT_PKTS. Compare those fields with IN_BYTES and IN_PKTS in the provided database log; done means the outgoing fields are stored with the exporter-provided values instead of zero.