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Cannot resolve symbol in CellTemplate binding

I have a ListView control ItemsSource bound to Producers property and it works well. But when I try to add some DataTriggers I am getting Cannot resolve symbol VS warning.
Code works but I want to get rid of warning by explicitly specifying binding source.

Producers

Cannot resolve symbol

I tried to use RelativeSource but found that CellTemplate can not use relative source as it is not part of VisualTree.

<ListView ItemsSource="{Binding Producers, ElementName=This}">
<ListView.View>
<GridView>
<GridViewColumn Header="Id" DisplayMemberBinding="{Binding Id}"></GridViewColumn>
<GridViewColumn Header="Description" DisplayMemberBinding="{Binding Description}"></GridViewColumn>
<GridViewColumn Header="Up">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock>
<TextBlock.Style>
<Style TargetType="TextBlock">
<Style.Triggers>
<DataTrigger Binding="{Binding Up}" Value="True">
<Setter Property="Foreground" Value="Green"></Setter>
</DataTrigger>
<DataTrigger Binding="{Binding Up}" Value="False">
<Setter Property="Foreground" Value="Red"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>


This element is defined as:

This

<Window x:Class="Helper.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Helper"
mc:Ignorable="d"
Title="MainWindow" Height="900.731" Width="889.344"
x:Name="This">
<Grid>
...
</Grid>
</Window>


Can someone help?

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