VM always open full screen on the wrong monitor

Hi,
I use Parallels Desktop Version 19.3.1 (54941) on a Mac Mini (M2 Pro chip), with a Windows11 VM (23H2 with last updates)

Two 4K displays are connected: display 1 on the left, configured as an extended display, and display 2 on the right, configured as the main macOS display.
On the dock, the Windows11 VM is attached to display 1.

Until a few days ago, when I launched the VM, it opened normally on display 1. But now, it always opens on display 2.
I really don't know what I did wrong (I dont remember I changed any setting...)
How can I do to force the VM open full screen on display 1?

Many thanks in advance for any help.