custom diff set in xm-proxy

[DARK-DEVIL-66]

{
"access-log-file": null,
"access-password": null,
"algo-ext": true,
"api": {
"id": null,
"worker-id": null
},
"http": {
"enabled": false,
"host": "127.0.0.1",
"port": 0,
"access-token": null,
"restricted": true
},
"background": false,
"bind": [
{
"host": "0.0.0.0",
"port": 8888,
"tls": true
},
{
"host": "::",
"port": 8888,
"tls": true
}
],
"colors": true,
"title": true,
"custom-diff": 120000,
"custom-diff-stats": true,
"donate-level": 0,
"log-file": null,
"mode": "nicehash",
"pools": [
{
"algo": "rx/0",
"url": "sg.zephyr.herominers.com:1123",
"user": "ZEPHYR2s5bnTUHNSTKfG9Gc6eC88LFNpEcHjChP2HTi1Wt1pry5XXqBWrLeUUYzzurC22ySZHLwvRgmSAvNcDXsZKm3K9uKBVD33w=120000",
"pass": "Saba-zephyr",
"keepalive": true,
"enabled": true,
"tls": true
}
],
"retries": 2,
"retry-pause": 1,
"reuse-timeout": 0,
"tls": {
"enabled": true,
"protocols": null,
"cert": null,
"cert_key": null,
"ciphers": null,
"ciphersuites": null,
"dhparam": null
},
"user-agent": null,
"syslog": false,
"verbose": false,
"watch": true,
"workers": true
}

i want to set custom diff 120000
so it's my config anything wrong plase tell me
Thank's

[DARK-DEVIL-66]

[2023-12-08 08:58:05.323] net 0000 new job from sg.zephyr.herominers.com:1123 diff 480045 algo rx/0 height 137091

xm-proxy console showing fallowing diff

[2023-12-08 08:58:05.323] net 0000 new job from sg.zephyr.herominers.com:1123 diff 480045 algo rx/0 height 137091

[DARK-DEVIL-66]

xmrig.exe -o serverip:8888 --tls -B --background --cpu-max-threads-hint=20

it's command used from my mining rig !
(--cpu-max-threads-hint=20) ignoring the argument why ?