fields in influxdb

hi i recently configured netflow on my router and i collect them with pmacct and save them into influxdb. in influx when i type show field keys, it prints:

fieldKey fieldType

bytes float

and when i type show tag keys, it prints:

tagKey

etype ip_dst ip_proto ip_src port_dst port_src tos

when i config my router to work with netflow, i create template like this:

match ipv4 tos

match ipv4 protocol

match ipv4 source address

match ipv4 destination address

match transport source-port

match transport destination-port

match flow direction

match interface input

collect interface output

collect counter bytes long

collect counter packets long

collect transport tcp flags

collect routing next-hop address ipv4

collect ipv4 source prefix

collect ipv4 destination prefix

collect timestamp sys-uptime first

collect timestamp sys-uptime last

as you see, i collect lots of different things but the only things i have is bytes

my question is why the only available field in influx is bytes and how can i have more fields?

Thanks.