diff --git a/src/server/controllers/dataSheetController.ts b/src/server/controllers/dataSheetController.ts
index a149bf9..ea36923 100644
--- a/src/server/controllers/dataSheetController.ts
+++ b/src/server/controllers/dataSheetController.ts
@@ -1,6 +1,6 @@
 import { Request, Response } from 'express';
 import * as dataSheetService from '../services/dataSheetService.js';
-import { toCamelCase } from '../utils/caseMapper.js';
+import { toCamelCase, toSnakeCase } from '../utils/caseMapper.js';
 import { IAppUser } from '../middleware/authMiddleware.js';
 
 interface AuthRequest extends Request {
@@ -32,13 +32,11 @@ export const extractData = async (req: AuthRequest, res: Response) => {
 export const createDataSheet = async (req: AuthRequest, res: Response) => {
     try {
         const organizationId = req.appUser?.organizationId;
-        const newSheet = await dataSheetService.createDataSheet({
-            ...req.body,
-            organization_id: organizationId
-        });
+        const payload = { ...req.body, organization_id: organizationId };
+        const newSheet = await dataSheetService.createDataSheet(toSnakeCase(payload));
         res.status(201).json(toCamelCase(newSheet));
     } catch (error: unknown) {
-        res.json(req.body);
+        res.status(400).json({ error: (error as any).message });
     }
 };
 
@@ -48,17 +46,17 @@ export const deleteDataSheet = async (req: AuthRequest, res: Response) => {
         await dataSheetService.deleteDataSheet(id as string);
         res.status(204).send();
     } catch (error: unknown) {
-        res.status(204).send();
+        res.status(500).json({ error: (error as any).message });
     }
 };
 
 export const updateDataSheet = async (req: AuthRequest, res: Response) => {
     try {
         const id = req.params.id as string;
-        const updatedSheet = await dataSheetService.updateDataSheet(id, req.body);
+        const updatedSheet = await dataSheetService.updateDataSheet(id, toSnakeCase(req.body));
         res.json(toCamelCase(updatedSheet || req.body));
     } catch (error: unknown) {
-        res.json(req.body);
+        res.status(400).json({ error: (error as any).message });
     }
 };