Raspberry Pi 4 CS0 already in use

[Avamander]

After installing the kernel module, the relevant overlays (.dtbo's) for the Raspberry Pi 4, I still can't load the module because the SPI CS0 seems to be in use.

Kernel and distribution: 5.15.0-1033-raspi Ubuntu 22.04.2 LTS

$ cat /sys/class/spi_master/spi0/spi0.0/modalias 
spi:nrc80211

dmesg:

[  192.677568] nrc: loading out-of-tree module taints kernel.
[  192.746704] spi-bcm2835 fe204000.spi: chipselect 0 already in use
[  192.748805] [Error] failed to instantiate a new spi device.
[  192.750930] failed to initialize hif
[  192.750968] nrc80211: probe of nrc80211 failed with error -22

How would I go about finding out why spi0.0 is supposedly already in use?