Item - Preprocessing - JSON Path ?

[RockerMan]

Hi

I collect data with script (zbx-hpmsa) from HPE MSA 2040. Everything works fine, except for data that has "-". And there are many such parameters.
Here is an example of JSON code:

{
"A":
{
"health":"OK",
"[B]health-num[/B]":"0",
"status":"Operational",
"[B]status-num[/B]":"0",
"redundancy":"Redundant",
"[B]redundancy-num[/B]":"2",
"[B]cpu-load[/B]":"28",
"iops":"634",
"[B]sc-fw[/B]":"GLS225R03-01",
"[B]flash-health[/B]":"OK",
"[B]flash-health-num[/B]":"0",
"[B]flash-status[/B]":"Installed",
"[B]flash-status-num[/B]":"1"},
"B":
{
"health":"OK",
"[B]health-num[/B]":"0",
"status":"Operational",
"[B]status-num[/B]":"0",
"redundancy":"Redundant",
"[B]redundancy-num[/B]":"2",
"[B]cpu-load[/B]":"1",
"iops":"0",
"[B]sc-fw[/B]":"GLS225R03-01",
"[B]flash-health[/B]":"OK",
"[B]flash-health-num[/B]":"0",
"[B]flash-status[/B]":"Installed",
"[B]flash-status-num[/B]":"1"
}
}

The data, in the parameters of which there is no "-", parsing good.

Tell me plz, how to properly format the parameter in the "JSON Path", with "-", to enable/work parsing?

-
With sincerely regards

PS
Sorry

# zabbix_server --version
zabbix_server (Zabbix) 4.0.2
# cat /etc/*release*
CentOS Linux release 7.5.1804 (Core)

[RockerMan]

add
the record as recommended in the documentation why it does not work

JSON Path  $['A']['cpu-load']

[RockerMan]

mystic, work...
although I have not changed the settings since yesterday

JSON Path $['A']['cpu-load']
JSON Path $['B']['cpu-load']