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DBX018: An event version has no upcaster

This page explains error DBX018 and how to fix it.

Cause

Section titled “Cause”

An event’s version has no upcaster for one of its older versions, or a typed upcaster is not the last step, or a step is past the current version.

Fix

Section titled “Fix”

Add up.From(n, json => ...) for every version from 1 to the current one minus 1. See change an event’s shape.