GSC Syntax Error on Robots.txt Managed by Cloudflare

This line of my robots.txt is being flagged by GSC as having a Syntax Error: Content-signal: search=yes,ai-train=no

Everything I'm finding says that this should not be added to my robots.txt, but Cloudflare is the one adding it. Can anyone provide clarity on what settings I need to change to fix this?
Was this page helpful?