There are several synonyms for the phrase "more cautioning". One option is the phrase "more warning", which implies a need to be alerted to potential risks or dangers. Another synonym is "more careful", which suggests a need to exercise greater discretion and be more mindful of potential risks. Additionally, "more circumspect" is a synonym that suggests a need to act with greater caution and avoid potential pitfalls. "More vigilant" is another synonym that suggests a need to be more watchful and aware of potential risks or threats. Ultimately, whichever synonym is chosen, the message is clear: be cautious and be aware.