Error 90158 — Handling time too long

Handling time (fulfillment latency) is set higher than Amazon's category limit, making the listing ineligible for Buy Box.

Setting 5+ day handling time on standard products. Most categories cap at 3 days for full Buy Box eligibility.

1. Reduce fulfillment_latency to 1–3 days.
2. If your fulfillment genuinely takes longer, switch to FBA where Amazon handles ship times.
3. Consider made-to-order categories which permit longer handling but limit visibility.

• Using long handling time as a buffer instead of fixing actual fulfillment speed