diff --git a/src/models/tanks.js b/src/models/tanks.js
index e03f994b..d27b4777 100644
--- a/src/models/tanks.js
+++ b/src/models/tanks.js
@@ -10,7 +10,7 @@ const ObjectId = Schema.Types.ObjectId;
 const code = Math.floor(100000 + Math.random() * 900000);
 const RoleSchema = new Schema({ name: String });
 const tanksSchema = new mongoose.Schema({
-    hardwareId: { type: String, unique: true },
+    hardwareId: { type: String },
     customerId: { type: String, default: null },
     tankName: { type: String, default: null },
     blockName: { type: String, default: null },