Hi Aleksandra,
1. Go to the Invoice Documents view.
2. In the Show field from drop down select All Invoice Documents and click on the Go button.
3. Click on the Advanced search link.
4. Under section Preceding Document , enter value for Preceding Document Id as XXX ,and Preceding Document Type as XYZ.
5. When you click on the Go button ,you will get the affected invoice .
6. Click on the Cancel button.
Now under Invoice Requests view ,it won't reflect as In-conflict anymore.
If this doesnt help, provide a screenshot to check.
Thanks
Lokesh Sharma