diff --git a/web/src/i18n/en.json b/web/src/i18n/en.json
index e033f49..7ca92fd 100644
--- a/web/src/i18n/en.json
+++ b/web/src/i18n/en.json
@@ -5,7 +5,7 @@
   "objects": { "title": "Objects", "empty": "No objects yet", "loadError": "Could not load objects", "notFound": "Object not found", "prev": "Previous", "next": "Next", "of": "of", "new": "New object", "filter": "Filter objects…", "pageSize": "Per page", "columns": { "number": "Object №", "name": "Name", "visibility": "Visibility", "location": "Location", "count": "#", "updated": "Updated" }, "unknownRef": "(unknown)" },
   "fieldsLabels": { "objectNumber": "Object number", "objectName": "Name", "count": "Number of objects", "briefDescription": "Brief description", "currentLocation": "Current location", "currentOwner": "Current owner", "recorder": "Recorder", "recordingDate": "Recording date", "visibility": "Visibility" },
   "visibility": { "draft": "Draft", "internal": "Internal", "public": "Public" },
-  "form": { "selectPlaceholder": "— select —", "create": "Create object", "save": "Save", "cancel": "Cancel", "visibility": "Visibility", "draft": "Draft", "internal": "Internal", "required": "This field is required", "rejected": "The server rejected the changes — check required and referenced fields", "fieldRejected": "The field \"{{field}}\" was rejected — check its value", "flexibleHeading": "Catalogue fields", "saving": "Saving…", "createAnother": "Save & create another" },
+  "form": { "selectPlaceholder": "— select —", "create": "Create object", "save": "Save", "cancel": "Cancel", "visibility": "Visibility", "draft": "Draft", "internal": "Internal", "required": "This field is required", "rejected": "The server rejected the changes — check required and referenced fields", "fieldRejected": "The field \"{{field}}\" was rejected — check its value", "flexibleHeading": "Catalogue fields", "saving": "Saving…", "createAnother": "Save & create another", "minCount": "Must be at least 1", "fieldError": { "type_mismatch": "Wrong type for this field", "unresolved": "Referenced value not found", "unknown": "Unknown field" } },
   "actions": { "edit": "Edit", "delete": "Delete", "rename": "Rename", "save": "Save", "closeDetail": "Close detail", "confirmDelete": "Delete this object? This cannot be undone.", "confirmDeleteTerm": "Delete this term? This cannot be undone.", "confirmDeleteAuthority": "Delete this authority? This cannot be undone.", "confirmDeleteField": "Delete this field definition? This cannot be undone.", "confirmDeleteVocabulary": "Delete this vocabulary? This cannot be undone.", "inUse": "Can't delete — used by {{count}} object(s). Clear those fields first." },
   "labels": { "label": "Label", "externalUri": "External URI (optional)", "otherLanguages": "This entry also has labels in other languages, which are kept." },
   "theme": { "light": "Light", "dark": "Dark", "system": "System" },
diff --git a/web/src/i18n/sv.json b/web/src/i18n/sv.json
index c25ba9c..6984ad8 100644
--- a/web/src/i18n/sv.json
+++ b/web/src/i18n/sv.json
@@ -5,7 +5,7 @@
   "objects": { "title": "Föremål", "empty": "Inga föremål ännu", "loadError": "Kunde inte ladda föremål", "notFound": "Föremålet hittades inte", "prev": "Föregående", "next": "Nästa", "of": "av", "new": "Nytt föremål", "filter": "Filtrera föremål…", "pageSize": "Per sida", "columns": { "number": "Föremålsnr", "name": "Namn", "visibility": "Synlighet", "location": "Plats", "count": "Antal", "updated": "Uppdaterad" }, "unknownRef": "(okänd)" },
   "fieldsLabels": { "objectNumber": "Föremålsnummer", "objectName": "Namn", "count": "Antal föremål", "briefDescription": "Kort beskrivning", "currentLocation": "Nuvarande plats", "currentOwner": "Nuvarande ägare", "recorder": "Registrerad av", "recordingDate": "Registreringsdatum", "visibility": "Synlighet" },
   "visibility": { "draft": "Utkast", "internal": "Intern", "public": "Publik" },
-  "form": { "selectPlaceholder": "— välj —", "create": "Skapa föremål", "save": "Spara", "cancel": "Avbryt", "visibility": "Synlighet", "draft": "Utkast", "internal": "Intern", "required": "Fältet är obligatoriskt", "rejected": "Servern avvisade ändringarna — kontrollera obligatoriska och refererade fält", "fieldRejected": "Fältet \"{{field}}\" avvisades — kontrollera värdet", "flexibleHeading": "Katalogfält", "saving": "Sparar…", "createAnother": "Spara & skapa ny" },
+  "form": { "selectPlaceholder": "— välj —", "create": "Skapa föremål", "save": "Spara", "cancel": "Avbryt", "visibility": "Synlighet", "draft": "Utkast", "internal": "Intern", "required": "Fältet är obligatoriskt", "rejected": "Servern avvisade ändringarna — kontrollera obligatoriska och refererade fält", "fieldRejected": "Fältet \"{{field}}\" avvisades — kontrollera värdet", "flexibleHeading": "Katalogfält", "saving": "Sparar…", "createAnother": "Spara & skapa ny", "minCount": "Måste vara minst 1", "fieldError": { "type_mismatch": "Fel typ för detta fält", "unresolved": "Refererat värde hittades inte", "unknown": "Okänt fält" } },
   "actions": { "edit": "Redigera", "delete": "Ta bort", "rename": "Byt namn", "save": "Spara", "closeDetail": "Stäng detalj", "confirmDelete": "Ta bort detta föremål? Detta kan inte ångras.", "confirmDeleteTerm": "Ta bort denna term? Detta kan inte ångras.", "confirmDeleteAuthority": "Ta bort denna auktoritet? Detta kan inte ångras.", "confirmDeleteField": "Ta bort denna fältdefinition? Detta kan inte ångras.", "confirmDeleteVocabulary": "Ta bort denna vokabulär? Detta kan inte ångras.", "inUse": "Kan inte ta bort — används av {{count}} föremål. Rensa de fälten först." },
   "labels": { "label": "Etikett", "externalUri": "Extern URI (valfritt)", "otherLanguages": "Denna post har även etiketter på andra språk, som behålls." },
   "theme": { "light": "Ljust", "dark": "Mörkt", "system": "System" },
diff --git a/web/src/objects/object-edit-form.test.tsx b/web/src/objects/object-edit-form.test.tsx
index f5cee74..18aed44 100644
--- a/web/src/objects/object-edit-form.test.tsx
+++ b/web/src/objects/object-edit-form.test.tsx
@@ -17,7 +17,7 @@ function tree() {
   );
 }
 
-test("edit: fields PUT 422 with field body -> field error message shown and field marked invalid", async () => {
+test("edit: fields PUT 422 with type_mismatch code -> code-specific field message shown and field marked invalid", async () => {
   server.use(
     http.get("/api/admin/objects/:id", () =>
       HttpResponse.json({ ...amphora, fields: { inscription: "old" } }),
@@ -33,8 +33,10 @@ test("edit: fields PUT 422 with field body -> field error message shown and fiel
   await screen.findByDisplayValue("Amphora");
   await userEvent.click(screen.getByRole("button", { name: /save/i }));
 
-  const alerts = await screen.findAllByText(/inscription.*rejected/i);
-  expect(alerts.length).toBeGreaterThanOrEqual(2);
+  // Banner still reports the rejected field name; the field highlight uses the code-specific message.
+  await screen.findByText(/inscription.*rejected/i);
+
+  expect(await screen.findByText("Wrong type for this field")).toBeInTheDocument();
 });
 
 test("edit: prefilled, save -> PUT core + PUT fields -> back to detail", async () => {
diff --git a/web/src/objects/object-edit-form.tsx b/web/src/objects/object-edit-form.tsx
index e341cc9..da8b6ea 100644
--- a/web/src/objects/object-edit-form.tsx
+++ b/web/src/objects/object-edit-form.tsx
@@ -30,7 +30,12 @@ function ObjectEditFormLoaded({ object, id }: { object: AdminObjectView; id: str
   const update = useUpdateObject();
   const setFields = useSetFields();
 
-  const locationState = location.state as { fieldsError?: boolean; fieldErrorKey?: string } | null;
+  const locationState = location.state as {
+    created?: boolean;
+    fieldsError?: boolean;
+    fieldErrorKey?: string;
+    fieldErrorCode?: string;
+  } | null;
 
   const [error, setError] = useState<string | null>(() => {
     if (locationState?.fieldErrorKey) return t("form.fieldRejected", { field: locationState.fieldErrorKey });
@@ -42,6 +47,10 @@ function ObjectEditFormLoaded({ object, id }: { object: AdminObjectView; id: str
     locationState?.fieldErrorKey ?? null,
   );
 
+  const [fieldErrorCode, setFieldErrorCode] = useState<string | null>(
+    locationState?.fieldErrorCode ?? null,
+  );
+
   useBreadcrumb([
     { label: t("nav.objects"), to: "/objects" },
     { label: object.object_number, to: `/objects/${id}` },
@@ -64,6 +73,7 @@ function ObjectEditFormLoaded({ object, id }: { object: AdminObjectView; id: str
   const onSubmit = async (values: ObjectFormValues): Promise<boolean> => {
     setError(null);
     setFieldErrorKey(null);
+    setFieldErrorCode(null);
 
     try {
       await update.mutateAsync({ id, body: values.core });
@@ -71,6 +81,7 @@ function ObjectEditFormLoaded({ object, id }: { object: AdminObjectView; id: str
     } catch (e) {
       if (e instanceof FieldRejection) {
         setFieldErrorKey(e.field);
+        setFieldErrorCode(e.code);
         setError(t("form.fieldRejected", { field: e.field }));
       } else {
         setError(t("form.rejected"));
@@ -89,6 +100,7 @@ function ObjectEditFormLoaded({ object, id }: { object: AdminObjectView; id: str
       defaults={defaults}
       formError={error}
       fieldErrorKey={fieldErrorKey}
+      fieldErrorCode={fieldErrorCode}
       onSubmit={onSubmit}
       onCancel={() => navigate(`/objects/${id}`)}
     />
diff --git a/web/src/objects/object-form.test.tsx b/web/src/objects/object-form.test.tsx
index 02ab635..a85efb4 100644
--- a/web/src/objects/object-form.test.tsx
+++ b/web/src/objects/object-form.test.tsx
@@ -47,6 +47,24 @@ test("required core + required flexible field block submit", async () => {
   expect(onSubmit).not.toHaveBeenCalled();
 });
 
+test("number_of_objects of 0 is blocked client-side with the minCount message", async () => {
+  const onSubmit = vi.fn();
+  renderApp(<ObjectForm mode="create" onSubmit={onSubmit} onCancel={() => {}} />);
+
+  await userEvent.type(await screen.findByLabelText(/object number/i), "A-9");
+  await userEvent.type(screen.getByLabelText(/^name/i), "Amphora");
+  await userEvent.type(screen.getByLabelText(/inscription/i), "To the gods");
+
+  const count = screen.getByLabelText(/number of objects/i);
+  await userEvent.clear(count);
+  await userEvent.type(count, "0");
+
+  await userEvent.click(screen.getByRole("button", { name: /create object/i }));
+
+  expect(await screen.findByText("Must be at least 1")).toBeInTheDocument();
+  expect(onSubmit).not.toHaveBeenCalled();
+});
+
 test("edit mode: no visibility control, save button, prefilled values", async () => {
   const onSubmit = vi.fn();
   renderApp(
diff --git a/web/src/objects/object-form.tsx b/web/src/objects/object-form.tsx
index 632fee9..fa6a5f6 100644
--- a/web/src/objects/object-form.tsx
+++ b/web/src/objects/object-form.tsx
@@ -51,6 +51,7 @@ export function ObjectForm({
   onCancel,
   formError,
   fieldErrorKey,
+  fieldErrorCode,
 }: {
   mode: "create" | "edit";
   defaults?: { core: ObjectCore; fields: Record<string, unknown> };
@@ -58,6 +59,7 @@ export function ObjectForm({
   onCancel: () => void;
   formError?: string | null;
   fieldErrorKey?: string | null;
+  fieldErrorCode?: string | null;
 }) {
   const { t } = useTranslation();
   const { default_language } = useConfig();
@@ -80,12 +82,14 @@ export function ObjectForm({
 
   useEffect(() => {
     if (fieldErrorKey) {
-      form.setError(`fields.${fieldErrorKey}` as never, {
-        type: "server",
-        message: t("form.fieldRejected", { field: fieldErrorKey }),
-      });
+      const codeKey = fieldErrorCode ? `form.fieldError.${fieldErrorCode}` : "";
+      const message =
+        fieldErrorCode && t(codeKey) !== codeKey
+          ? t(codeKey)
+          : t("form.fieldRejected", { field: fieldErrorKey });
+      form.setError(`fields.${fieldErrorKey}` as never, { type: "server", message });
     }
-  }, [fieldErrorKey, form, t]);
+  }, [fieldErrorKey, fieldErrorCode, form, t]);
 
   const runSubmit = (createAnother: boolean) =>
     handleSubmit(async (data) => {
@@ -106,7 +110,7 @@ export function ObjectForm({
   const coreField = (
     key: keyof ObjectCore,
     labelKey: string,
-    opts?: { type?: string; required?: boolean },
+    opts?: { type?: string; required?: boolean; min?: number },
   ) => (
     <div className="space-y-1">
       <Label htmlFor={key}>{t(`fieldsLabels.${labelKey}`)}</Label>
@@ -117,14 +121,20 @@ export function ObjectForm({
         {...register(
           `core.${key}` as const,
           opts?.type === "number"
-            ? { valueAsNumber: true, required: opts?.required }
+            ? {
+                valueAsNumber: true,
+                required: opts?.required,
+                ...(opts?.min !== undefined
+                  ? { min: { value: opts.min, message: t("form.minCount") } }
+                  : {}),
+              }
             : { required: opts?.required },
         )}
       />
 
       {errors.core?.[key] && (
         <p role="alert" className="text-xs text-destructive">
-          {t("form.required")}
+          {errors.core[key]?.message || t("form.required")}
         </p>
       )}
     </div>
@@ -149,7 +159,7 @@ export function ObjectForm({
 
       {coreField("object_number", "objectNumber", { required: true })}
       {coreField("object_name", "objectName", { required: true })}
-      {coreField("number_of_objects", "count", { type: "number", required: true })}
+      {coreField("number_of_objects", "count", { type: "number", required: true, min: 1 })}
       {coreField("brief_description", "briefDescription")}
       {coreField("current_location", "currentLocation")}
       {coreField("current_owner", "currentOwner")}