Zabbix 6.4.10 - Invalid Discovery rule

[GarrettCO]

Baffled at what is causing this issue once SNMP OID Discovery Rule is enabled, although template test was successful. Went over the rule with a fine-tooth comb and compared to out-of-the-box Zabbix discovery rules.

Additionally I was able to confirm from a test host Latest Value that the SNMP OID values do appear successfully.

Invalid discovery rule value: cannot parse as a valid JSON object: invalid object format, expected opening character '{' or '[' at:
'.1.3.6.1.4.1.6431.1.3.7.1.0 = Counter64: 12
.1.3.6.1.4.1.6431.1.3.7.2.0 = Counter64: 0'

[ISiroshtan]

Instead of showing item prototype configuration, could you show discovery configuration? And specifically the "preprocessing" tab of the discovery configuration. Based on error text the problem lies there.
You can double check expected configuration in the documentation.

[cyber]

missing a walk to json preprocessing?