How do to update database by selected treeview row

greetings, I am trying to update my sqlite3 database by selecting a specific row in the Treeview and editing it, so I can update it in the database using primary key autoincrement  id

the problem: The update is not applied to the sqlite3 database it only applied to Treeview.

I have tried the following:

#  treeview column

 def buying_checks_only_payment(self):
         #unimportant treeview info's
         self.buying_checkspaymenttree['columns'] = ("اdate", "اvalue", "checknum"اcheckid")

# add values into treeview
def buying_addcheck(self):
         self.checksrecords=[]
         self.checkid += 1
         self.buying_checkspaymenttree.insert("", 'end', values=(
            self.buying_check_date_var.get(), self.buying_check_value_var.get(),
            self.buying_check_num_var.get(), self.checkid,self.makevar.get(),self.sellernamevar.get(),self.Buyingdate_var.get            (),self.cashepayments.get(),self.buying_nocheckpic))

        for child in self.buying_checkspaymenttree.get_children():
             self.checksrecords.append(self.buying_checkspaymenttree.item(child)["values"]) 

#add  treeview values into database trying to use the primry key as self.rowid
def buying_checksdb(self):
        self.conn = sqlite3.connect('car dealership.db')
        self.cursorObj = self.conn.cursor()
        for self.checksrecords in self.checksrecords:
            self.cursorObj.execute(
                "INSERT INTO cars_buying_checksonly (checkdate, checkvalue, checknum, carmake, Sellername, buyingdate, entirepaymentmethod, checkpic)values(?,?,?,?,?,?,?,?)",
                (self.checksrecords[0], self.checksrecords[1], self.checksrecords[2], self.checksrecords[3],
                 self.checksrecords[4], self.checksrecords[5], self.checksrecords[6], self.checksrecords[7]))
            self.conn.commit()
            self.rowid=self.cursorObj.lastrowid
            print(self.rowid)


#trying to select the row and edit it in treeview to update it in the database 
def buying_editcheck(self):
        self.conn = sqlite3.connect('car dealership.db')
        self.cursorObj = self.conn.cursor()

        self.buying_selected_check_edit = self.buying_checkspaymenttree.selection()[0]
        print(self.buying_checkspaymenttree.item(self.buying_selected_check_edit)['values'])
        uid = self.buying_checkspaymenttree.item(self.buying_selected_check_edit)['values'][0]


        self.buying_checkspaymenttree.item(self.buying_selected_check_edit, values=(
        self.buying_check_date_var.get(), self.buying_check_value_var.get(),self.buying_check_num_var.get(),
        self.checkid))  #is using self.rowid instead of self.checkid can help?
      

        self.cursorObj.execute("UPDATE cars_buying_checksonly SET checkdate=?, checkvalue=?, checknum=? WHERE uid=?",               (self.buying_check_date_var.get(),self.buying_check_value_var.get(),self.buying_check_num_var.get(),uid,))

self.conn.commit()