I'm trying to change an app's Primary Language in App Store Connect from de-DE to nl-NL and hitting a state I can't resolve through any interface available to me. Environment App Store Connect (web UI) and App Store Connect API v1 Problem UI: App Information → Primary Language → nl-NL → Save fails with: "Primary Locale couldn't be saved because you must first provide all the required screenshots for each version in this language." API: PATCH /v1/apps/1669670490 with attributes.primaryLocale = "nl-NL" returns HTTP 409: ENTITY_ERROR.ATTRIBUTE.INVALID.INVALID_STATE.MISSING_SCREENSHOTS_PRIMARY_LOCALE Error detail contains an unsubstituted placeholder: "...you must first provide all the required @@LANGUAGE_VALUE@@ screenshots..." What I've verified Current live version (3.7.6) and current editable version (3.7.11) both have complete nl-NL screenshot sets for all required device sizes (6.9" iPhone, 13" iPad). No Watch app, iMessage extension, Custom Product Pages, In-App Events, or IAPs. Enumerated all 23 versions via the API (1.0 → 4.1.0). 19 of them have an nl-NL appStoreVersionLocalization (with real historical description/keywords/support URL) but zero nl-NL screenshots attached. Tried POSTing an nl-NL screenshot set to one historical version (4.1.0) directly via the API to confirm this isn't just a UI restriction. Also returns 409 ENTITY_ERROR.ATTRIBUTE.INVALID.INVALID_STATE — historical versions are locked against edits (including screenshots) at the API level, not just the UI. Question Since these historical versions can't be edited through any supported interface, is there a documented way to satisfy or bypass the "screenshots for each version" check for locked historical versions when changing Primary Locale? Filed as case 20000130035264 with Developer Support, who pointed me here for the technical side.