fixed: se aggiungo una Provincia sul frontend non si aggiungeva

src/server/models/province.js

@@ -35,11 +35,32 @@ const ProvinceSchema = new Schema({
   link_grp: {
     type: String,
   },
+  card : {
+    type: String,
+  },
+  
   link_telegram: {
     type: String,
   },
 }, { _id : false });
 
+ProvinceSchema.pre('save', async function (next) {
+  if (this.isNew) {
+    const myrec = await Province.findOne().limit(1).sort({_id:-1});
+    if (!!myrec) {
+      if (myrec._doc._id === 0)
+        this._id = 1;
+      else
+        this._id = myrec._doc._id + 1;
+
+    } else {
+      this._id = 1;
+    }
+  }
+
+  next();
+});
+
 ProvinceSchema.statics.getRegionByStrProvince = async function(strprovince) {
   const myrec = await Province.findOne({prov: strprovince}).lean();
   if (myrec) {