diff --git a/server/services/ocp/controller/materials/mainMaterial.ts b/server/services/ocp/controller/materials/mainMaterial.ts
index 3f513f0..5e6dee7 100644
--- a/server/services/ocp/controller/materials/mainMaterial.ts
+++ b/server/services/ocp/controller/materials/mainMaterial.ts
@@ -11,6 +11,16 @@ export const isMainMatStaged = async (lot: any) => {
         return isStaged;
     }
 
+    if (typeof lot !== "object" || lot === null || Array.isArray(lot)) {
+        createLog(
+            "info",
+            "mainMaterial",
+            "ocp",
+            `The lot sent over is not an object: ${JSON.stringify(lot)}`
+        );
+        return isStaged;
+    }
+
     const updateQuery = mmQuery.replaceAll("[lotNumber]", lot.lot);
 
     try {