USB soundcard (Bose) configuration does not survive reboot

Hi folks,

I am very happy with my Bose Campanion 5 USB soundcard. Once configured, it works fine with pulseaudio. However, every time I reboot my machine, I have to reconfigure it because the “old” device setting is not reused but instead a new device is recognized:
The output of dmesg when I replug my device is the following:

 3688.349089] usb 7-1: new full-speed USB device number 4 using uhci_hcd 3688.523157] usb 7-1: New USB device found, idVendor=05a7, idProduct=1020
 3688.523165] usb 7-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
 3688.523169] usb 7-1: Product: Bose USB Audio
 3688.523174] usb 7-1: Manufacturer: Bose Corporation
 3688.537157] ALSA clock.c:309 4:1:1: cannot get freq at ep 0x1
 3688.573437] hid-generic 0003:05A7:1020.0006: hiddev0,hidraw0: USB HID v1.10 Device [Bose Corporation Bose USB Audio] on usb-0000:00:1d.1-1/input2

How can I ensure that the soundcard stays configured as the same device?

Thanks in advance,