How to fix the datapicker button border in XAML WPF?

Question

I need to fix the datapicker button left border, when the datapicker is disabled there's the left-border show with a black color, i didn't do any cutomized style, how can i fix it ? plz look at the image on link below.

https://i.ibb.co/LrZqf35/Capture.jpg

Thank you.

<DatePicker  IsEnabled="{Binding ContientAnalyseDiagnostic}" SelectedDate=" 
{Binding DateDeb}" />