All binding with different index collection items update at the same time WPF

[EDN Admin]

I have code like this in my WPF view ..

<!--Column 2-->
<Border Grid.Column="1" Grid.Row="1" >
<TextBox x:Name="textB2BR0K2" Text="{Binding Path=ListBlok2B[0].B2B1}" />
</Border>
<TextBox x:Name="textB2BR1AK2" Grid.Column="1" Grid.Row="4" Text="{Binding Path=ListBlok2B[0].B2BR1A}"/>
<TextBox x:Name="textB2BR1BK2" Grid.Column="1" Grid.Row="5" Text="{Binding Path=ListBlok2B[0].B2BR1B}"/>
<TextBox x:Name="textB2BR1CK2" Grid.Column="1" Grid.Row="6" Text="{Binding Path=ListBlok2B[0].B2BR1C}"/>

<!--Column 3-->
<Border Grid.Column="2" Grid.Row="1" >
<TextBox x:Name="textB2BR0K3" Text="{Binding Path=ListBlok2B[1].B2B1}" />
</Border>
<TextBox x:Name="textB2BR1AK3" Grid.Column="2" Grid.Row="4" Text="{Binding Path=ListBlok2B[1].B2BR1A}"/>
<TextBox x:Name="textB2BR1BK3" Grid.Column="2" Grid.Row="5" Text="{Binding Path=ListBlok2B[1].B2BR1B}"/>
<TextBox x:Name="textB2BR1CK3" Grid.Column="2" Grid.Row="6" Text="{Binding Path=ListBlok2B[1].B2BR1C}"/>

And then I have fill this field from my database from my collection and work properly. But when I try to change one of the value all the data that have some binding attributes changes at the same time
`ListBlok2B[0].B2BR1A` and `ListBlok2B[1].B2BR1A` changes at the same time when I try to edit inside it..

Anyone knows how to solve this? I want it to bind in different index collection that I have so I can insert it to my database`context.Blok2Bs.insertAllOnSubmit(ListBlok2B)`

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