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1.7.0 made both methods required on CustomAdapter and removed the factory fallback, so a custom adapter written for 1.6 type-checks against nothing and throws at request time on the first OTP, magic link, password reset, or two-factor attempt. Restore the fallbacks. consumeOne without a native implementation runs findOne then an id-guarded deleteMany and wins only when exactly one row was deleted. incrementOne runs a bounded compare-and-swap loop: findOne, then updateMany guarded on the id and the counter values just read, retried when a concurrent writer changed the row first. Both are single guarded statements per attempt, so they stay atomic across processes without transactions.