diff --git a/src/interfaces/utils.ts b/src/interfaces/utils.ts
index d5fde6c..e791c9f 100644
--- a/src/interfaces/utils.ts
+++ b/src/interfaces/utils.ts
@@ -19,10 +19,20 @@ export type LogSequence = {
 };
 
 export function setLogDataDiff(req: RequestWithUser, data: DataDiff) {
-  req.app.locals.logData.dataDiff = {
-    before: JSON.stringify(data.before),
-    after: JSON.stringify(data.after),
-  };
+  // Check if data.before and data.after are valid objects
+  if (
+    data.before &&
+    typeof data.before === "object" &&
+    data.after &&
+    typeof data.after === "object"
+  ) {
+    req.app.locals.logData.dataDiff = {
+      before: JSON.stringify(data.before),
+      after: JSON.stringify(data.after),
+    };
+  } else {
+    console.error("Invalid data provided: both before and after must be valid objects.");
+  }
 }
 
 export function addLogSequence(req: RequestWithUser, data: LogSequence) {