diff --git a/src/shared/validation/schemas/settings.ts b/src/shared/validation/schemas/settings.ts
index 21a30fb3a7..9fdd8b6caa 100644
--- a/src/shared/validation/schemas/settings.ts
+++ b/src/shared/validation/schemas/settings.ts
@@ -1,8 +1,5 @@
 import { z } from "zod";
-import {
-  ACCOUNT_FALLBACK_STRATEGY_VALUES,
-  ROUTING_STRATEGY_VALUES,
-} from "@/shared/constants/routingStrategies";
+import { ROUTING_STRATEGY_VALUES } from "@/shared/constants/routingStrategies";
 import { SUPPORTED_BATCH_ENDPOINTS } from "@/shared/constants/batchEndpoints";
 import { MAX_REQUEST_BODY_LIMIT_MB, MIN_REQUEST_BODY_LIMIT_MB } from "@/shared/constants/bodySize";
 import { COMBO_CONFIG_MODES } from "@/shared/constants/comboConfigMode";
@@ -15,11 +12,6 @@ import {
 } from "@/shared/constants/upstreamHeaders";
 import { MAX_TIMER_TIMEOUT_MS } from "@/shared/utils/runtimeTimeouts";
 
-// ──── Settings Schemas ────
-// FASE-01: Removed .passthrough() — only explicitly listed fields are accepted
-
-export const settingsFallbackStrategySchema = z.enum(ACCOUNT_FALLBACK_STRATEGY_VALUES);
-
 // Single source of truth: ../settingsSchemas (the schema the runtime settings route validates
 // against). Re-exported here so this modular barrel stays in exact lockstep — a divergent local
 // copy (introduced by the #3988 lossy modularization) silently dropped 40 fields while gaining a
diff --git a/tests/unit/settings-schema-routing-strategies.test.ts b/tests/unit/settings-schema-routing-strategies.test.ts
index 04b94523a4..964fe19e6b 100644
--- a/tests/unit/settings-schema-routing-strategies.test.ts
+++ b/tests/unit/settings-schema-routing-strategies.test.ts
@@ -2,6 +2,7 @@ import test from "node:test";
 import assert from "node:assert/strict";
 import { SETTINGS_FALLBACK_STRATEGY_VALUES } from "@/shared/constants/routingStrategies";
 import { updateSettingsSchema as settingsRouteSchema } from "@/shared/validation/settingsSchemas";
+import * as sharedSchemaModule from "@/shared/validation/schemas";
 import { updateSettingsSchema as sharedSettingsSchema } from "@/shared/validation/schemas";
 
 for (const strategy of SETTINGS_FALLBACK_STRATEGY_VALUES) {
@@ -23,6 +24,10 @@ test("settings schemas reject combo-only strategies as account fallback strategi
   }
 });
 
+test("shared settings schema module omits the unused fallback strategy sub-schema export", () => {
+  assert.equal("settingsFallbackStrategySchema" in sharedSchemaModule, false);
+});
+
 test("settings schemas accept cooldown-aware retry knobs", () => {
   const payload = {
     requestRetry: 3,