**Tehden ERP version 26.4.07** released 22.09.2026

All changes are for v2308 & v2605 unless otherwise stated

Endpoints 
- POST /products/{productId}/prices
Before, the request always created a new price row, even when purchasePrice / price / taxPrice matched the current price. Now an identical request is rejected with `failed_to_create_product_price` ("No changes in product price, aborted.") instead of returning 201.