diff --git a/src/private/categories/AddOrEditCategoryForm.jsx b/src/private/categories/AddOrEditCategoryForm.jsx
index 7014292..a354ce8 100644
--- a/src/private/categories/AddOrEditCategoryForm.jsx
+++ b/src/private/categories/AddOrEditCategoryForm.jsx
@@ -43,7 +43,7 @@ function formatDateSafe(value) {
   }).format(d);
 }
 
-export default function AddOrEditCategoryForm({ onAdd, initialData, onCancel, materials: materialsProp = [], initialMaterialNames = [], originalMongoId, originalGuid }) {
+export default function AddOrEditCategoryForm({ onAdd, initialData, onCancel, materials: materialsProp = [], initialMaterialNames = [] }) {
   const { user } = useAuth();
   const token = user?.thalosToken || localStorage.getItem('thalosToken');
   const api = useMemo(() => new CategoriesApi(token), [token]);
@@ -62,7 +62,7 @@ const tagLabelById = useMemo(() => {
 }, [allTags]);
 
   const [form, setForm] = useState({
-    _Id: '',
+    _id: '',
     id: '',
     tenantId: '',
     tagName: '',
@@ -127,8 +127,8 @@ const tagLabelById = useMemo(() => {
   useEffect(() => {
     if (initialData) {
       setForm({
-        _Id: initialData._Id,
-        Id: initialData.Id,
+        _id: initialData._id,
+        id: initialData.id,
         tenantId: initialData.tenantId || extractTenantId(token) || '',
         tagName: initialData.tagName || initialData.name || '',
         typeId: initialData.typeId || '',
@@ -144,7 +144,7 @@ const tagLabelById = useMemo(() => {
       });
     } else {
       setForm({
-        _Id: '',
+        _id: '',
         id: '',
         tenantId: extractTenantId(token) || '',
         tagName: '',
@@ -162,7 +162,7 @@ const tagLabelById = useMemo(() => {
     }
   }, [initialData]);
 
-  const isEdit = Boolean(form._Id);
+  const isEdit = Boolean(form._id);
   const isAdd = !isEdit;
 
   const setVal = (name, value) => setForm(p => ({ ...p, [name]: value }));
@@ -170,7 +170,7 @@ const tagLabelById = useMemo(() => {
   const handleChange = (e) => {
     const { name, value } = e.target;
     setVal(name, value);
-    if (name === 'tagName' && !form._Id) {
+    if (name === 'tagName' && !form._id) {
       setVal('slug', slugify(value));
     }
   };
@@ -185,6 +185,7 @@ const tagLabelById = useMemo(() => {
       if (!tenantId) throw new Error('TenantId not found in token');
 
       const base = {
+        id: form.id?.trim() || undefined,
         tagName: form.tagName.trim(),
         typeId: form.typeId,
         parentTagId: form.parentTagId,
@@ -195,17 +196,16 @@ const tagLabelById = useMemo(() => {
         tenantId, // requerido por backend (400 si falta)
       };
 
-      if (form._Id) {
-        // UPDATE
-        // Prefer Mongo _id (24-hex) if present; fallback to GUID
-        const idForUpdate = form._Id;
+      if (form._id) {
+        const idForUpdate = Boolean(form._id) ? String(form._id) : null;
+        if (!idForUpdate) throw new Error('Missing _id for update');
         const payload = {
-          id: idForUpdate,
+          _id: idForUpdate,
           ...base,
         };
+        console.log('[CategoryForm] SUBMIT (edit) with _id:', idForUpdate, 'payload:', payload);
         await api.update(payload);
       } else {
-        // CREATE
         await api.create(base);
       }
 
@@ -221,10 +221,9 @@ const tagLabelById = useMemo(() => {
 
   const handleDelete = async () => {
     try {
-      // Prefer Mongo _id if it looks like a 24-hex; otherwise fall back to GUID id
-      const hex = (typeof form._Id === 'string' && /^[0-9a-f]{24}$/i.test(form._Id)) ? form._Id : null;
-      const idToUse = hex || form._Id;
-      if (!idToUse) throw new Error('Missing id to delete');
+      const idToUse = form._id;
+      if (!idToUse) throw new Error('Missing _id to delete');
+      console.debug('[CategoryForm] DELETE with _id:', idToUse);
       await api.changeStatus({ id: idToUse, status: 'Inactive' });
       if (onAdd) {
         await onAdd();
@@ -238,7 +237,7 @@ const tagLabelById = useMemo(() => {
   return (
     <Paper sx={{ p: 2 }}>
       <Typography variant="subtitle1" sx={{ mb: 2 }}>
-        {form._Id ? 'Edit Category' : 'Add Category'}
+        {form._id ? 'Edit Category' : 'Add Category'}
       </Typography>
 
       {isAdd && (
@@ -359,7 +358,7 @@ const tagLabelById = useMemo(() => {
         <MenuItem value="Inactive">Inactive</MenuItem>
       </TextField>
 
-      {form._Id ? (
+      {form._id ? (
         <Box sx={{ display: 'grid', gridTemplateColumns: { xs: '1fr', md: '1fr 1fr' }, gap: 2, mt: 2 }}>
           <TextField label="Created At" value={formatDateSafe(form.createdAt)} InputProps={{ readOnly: true }} fullWidth />
           <TextField label="Created By" value={form.createdBy ?? '—'} InputProps={{ readOnly: true }} fullWidth />
@@ -369,7 +368,7 @@ const tagLabelById = useMemo(() => {
       ) : null}
 
       <Box display="flex" justifyContent="space-between" gap={1} mt={3}>
-        {form._Id ? (
+        {form._id ? (
           <Button color="error" onClick={handleDelete}>Delete</Button>
         ) : <span />}
         <Box sx={{ display: 'flex', gap: 1 }}>