Terje,

From the url: https://wiki.x266.mov/blog/svt-av1-second-deep-dive

"Preset 7: v2.0.0 vs v2.1.0

Again, there is no preset 7. Actually, it's preset 6 that disappeared but I'm not remaking the graphs just for fun. If you select preset 6, you will be granted the following message: Svt[warn]: Preset M6 is mapped to M7."

Why and what does this output message mean?

Svt[warn]: Preset M6 is mapped to M7.