Ms access database is updated when the subform on Mainform is updated via vba

Question

I have very strange problem I am working with MS access 2013 a application called "failure Analysis system" through which user can enter a different data for different system.

I have cread a main form to enter a data lets say " Tb_Mainform " and in this Mainform I have also one subform called " tb_subform ". whenever user change one combox in Mainform the subform is updated using

Me.tb_suform.form.recordsoure = query

Me.tb_subform.requery

until now everything is gud subform is also updated. when i click on subform to navigate, it updated the table with half unfilled data.

How can i prevent this. I am opening the main form by using

DoCmd.OpenForm "tb_Mainform", WindowMode:=acDialog, DataMode:=acFormAdd, OpenArgs:=C_ID

PS : Main form and subform using the same database table.

Below is the link with the same problem as mine. it is 6 year old post but i think after that something has to be change in Access until now.

How do I prevent clicks on a subform causing updates on the main form

Answer 1

I have created an unbound form. It contain subforom where I am saving the records manually in vba.

comment by ChrisPadgham helped me a lot