Setting the console variable '*****' with 'SetByGameSetting' was ignored as it is lower priority than the previous 'SetByCode'

I keep getting warnings in my console, with the form:

“Setting the console variable ‘t.MaxFPS’ with ‘SetByGameSetting’ was ignored as it is lower priority than the previous ‘SetByCode’”

It’s not always t.MaxFPS.

How can I fix this? Where do I find the place that is setting t.MaxFPS?