I think I would have missed it. The original recommendation referred to a study whose subtle wording in the results

Consumption of peanuts while pregnant or breast feeding was more common among mothers of probands aged </=5 years than mothers of probands aged >5 years (P<0.001).

and conclusion

Peanut allergy is presenting earlier in life, possibly reflecting increased consumption of peanut by pregnant and nursing mothers.

were misinterpreted. While that survey ranks low in the hierarchy of evidence, it’s still a finding, and the discrepancy between its statements & the guideline’s seems easy for an untrained reader to miss.