Impact of high HHV on GE 9E performance

I'm working with a gas turbine of GE-9E, equipped with WLN burner and duel fuel capability, currently running on natural gas. Sometimes we experience higher quality of gas from the gas grid. Say, HHV 1045 BTU/SCF raises up to 1100 BTU/SCF. Should there be any performance degradation? Or, anything should I worry about?
Let me know if any more information is required for an explanation. I'd love to know.