diff --git a/components/forms/SettingsSubmit.tsx b/components/forms/SettingsSubmit.tsx
index c10f6b6f..3cfbefcd 100644
--- a/components/forms/SettingsSubmit.tsx
+++ b/components/forms/SettingsSubmit.tsx
@@ -7,6 +7,10 @@ import { useRouter, useSearchParams } from "next/navigation";
 
 /** CO₂ Galvo implementation only (per spec). Other targets intentionally omitted. */
 type Target = "settings_co2gal";
+// Accept any of the known targets from callers (e.g., SettingsSwitcher),
+// but we still hard-lock behavior to CO₂ Galvo internally.
+type ExternalTarget = "settings_fiber" | "settings_co2gan" | "settings_co2gal" | "settings_uv";
+
 type Opt = { id: string; label: string };
 type Me = { id: string; username?: string; email?: string };
 
@@ -79,7 +83,7 @@ type EditInitialValues = {
   raster_settings?: any[] | null;
 };
 
-type BaseProps = { initialTarget?: Target };
+type BaseProps = { initialTarget?: ExternalTarget };
 type CreateProps = BaseProps & { mode?: "create"; submissionId?: never; initialValues?: never };
 type EditProps = BaseProps & { mode: "edit"; submissionId: string | number; initialValues: EditInitialValues };
 function isEditProps(p: CreateProps | EditProps): p is EditProps {