ArgumentException: Invalid schema property name: Type

I have encountered an issue where SV is throwing an argument exception when I try and use the Copy() method. 

Internal server error\nC# rule Build Response execution failed on line 174 with error ArgumentException: Invalid schema property name: Type. Only supported property names are: agentId, partnerAgentId, id, modelAccuracyLevel, operatingSystem, dhcpHostname, gatewayMac, feedback, model, brand, typeXX, ipv4, mac, ip, deviceName, lastSeen, accurate, capabilities, activeMac, macs, workingServiceStatusCategory, displayCategory\n 

The JSON payload doesn't contain the field name "Type" and I have replaced ALL instances of the substring "type" regardless of case with "typeXX". Has anyone enountered this before? And more importantly, if they have do they have a fix? Slight smile