Able to build key in QA with same basefile from prod, but key build fails in Prod

QA - key from "reports::sbfe::submissionv4::base::increment_20150915_120926" basefile copied from prod
http://10.173.40.2:8010/?legacy&inner=../WsWorkunits/WUInfo%3FWuid%3DW20150916-082252

Prod – Key – failed – same increments base file as above
http://10.194.51.2:8010/?legacy&inner=../WsWorkunits/WUInfo%3FWuid%3DW20150916-095103

Increment basefile WU in Prod:
http://10.194.51.2:8010/?legacy&inner=../WsWorkunits/WUInfo%3FWuid%3DW20150915-113312

Error:
eclagent 0: System error: 0: key+payload (30121) exceeds max length (8628) (in Index Write G1 E5)