Microsoft Excel - Runtime error 3020 update or cancel update without addnew or edit in Access

I need some help with this as I am not an Access person. I got handed this task due to the abrupt departure of a co-worker. 

We have a registration database for a conference that is giving me an error "Runtime error 3020 update or cancel update without addnew or edit".  This happens when a record is updated and the save button is not clicked. If I try to go to another record it gets the error and I am forced to close the database and then go back in and update that record again and make sure SAVE button gets pushed.

Again I am not familiar with how Access works and I have just 2 weeks to make sure it works..  So your help and patience will be much appreciated.

Thanks

Marcos

OK, i did a search in the code and I am not seeing any coding as mentioned. I did check that other article and I only found update once in the coding, see below..  I didn't see any .addnew or .edit either.

Private Sub Combo52_AfterUpdate()
    ' Find the record that matches the control.
    Dim rs As Object

    Set rs = Me.Recordset.Clone
    rs.FindFirst "[AttendeeID] = " & Str(Nz(Me![Combo52], 0))
    If Not rs.EOF Then Me.Bookmark = rs.Bookmark
End Sub

Not sure this will help or maybe I am looking in the wrong place.   I just need for the thing to save on changing to a new record without clicking the save button.

Here is the code for the SAVE part

Private Sub Save_Record_Click()
On Error GoTo Err_Save_Record_Click

    DoCmd.DoMenuItem acFormBar, acRecordsMenu, acSaveRecord, , acMenuVer70

Exit_Save_Record_Click:
    Exit Sub

Err_Save_Record_Click:
    MsgBox Err.Description
    Resume Exit_Save_Record_Click