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POST
A configuration is never edited: a change is the next version, stated whole. The body is the values alone — the Archetype and the identifier were fixed at creation, and the path names the configuration — and the same frame checks apply, as at creation. Try the body first: the preview takes it, runs these checks, and writes nothing.
A new version does not reach an issued Loan. Its Schedule, its amounts and its disclosed cost figure were priced at issuance, and nothing recomputes them. New issuances name the new version explicitly — configuration_version is always pinned.

Path parameters

string
required
The Tenancy writing.
string
required
The configuration the version belongs to.

Headers

string
Your own value, up to 255 bytes. This route carries no reference of yours, so the key is what makes a retry safe: the first outcome — refusals included — is recorded and answers every identical repeat for 24 hours, marked Idempotent-Replayed: true. The same key with a different request is 422 idempotency_mismatch.It is the fifth line of the signed canonical string, so sign with the key you send. Retries carries the whole rule.

Body

object
required
The terms, whole — every field the frame requires, restated. A version is not a diff: what it does not state, it does not have.

Response

201 with the stored configuration at its new version, counting from 1 and rising by one, with effective beside values and the advisories the body earns — as creation answers them. An advisory refuses nothing.

Refusals

Everything creation refuses, plus a body naming archetype — the shape never changes.