General :: Cannot Update - Database Or Object Is Read-only

I have 2 tables and from them I do a query called "Query_Dates". There, I created 4 calculated fields which compares fields of the two tables previously mentioned.

What I am trying to do is everytime the calculated fields are equal to "Diff", gets the value from the second table (ADHOC) and and puts it in the 1st table (Master_Table). In total there are 4 fields I would change depending on other 4 fields called (CheckRR, CheckQual, CheckProd, CheckCap).

The problem is that it gives me an error 3027, object is read-only.

Below, you can find the code.

Private Sub Comando27_Click()
Dim rst As DAO.Recordset
Dim rsd As DAO.Recordset
Dim supplierName As String
Set rsd = Application.CurrentDb.OpenRecordset("Query_Dates", dbOpenDynaset)
Set rst = Application.CurrentDb.OpenRecordset("Master_Table" , dbOpenDynaset)

[Code] .....