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OPA657: Getting Second Harmonics Peak at the output of OPA657

Part Number: OPA657

Hi Ti Team 

At the output of  OPA657, we are getting a second harmonic peak which is degrading our SFDR. PFB  CRO observation and schematic for your reference

we have tried following few things but no improvement in 2nd harmonics
1.Removed Capacitor C92, C84 
2.Placed additional Decap in stack up on  Ref. C351,C370 (2.2Uf),and ,C368,C369(0.1uF)
3. Changed resistor value R144(0R) to new value 15R ( AS mention in the datasheet that increasing the load resistance will improve the second harmonics @ page 19 of opa657 datasheet.)
Can you please suggest some review points to fix this issue. 
Thanks & Regards
Balvan Singh