changes

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, required: true },
+    hardwareId: { type: String, unique: true },
     customerId: { type: String, default: null },
     tankName: { type: String, default: null },
     blockName: { type: String, default: null },
@@ -44,7 +44,7 @@ const motordataSchema = new mongoose.Schema({
 
 
 const IOttankSchema = new mongoose.Schema({
-    hardwareId: { type: String, required: true },
+    hardwareId: { type: String},
     tankHeight: { type: String, required: true },
     maxLevel: { type: String, required: true },
     minLevel: { type: String, required: true },