Replacement of a boot drive

[Adlatus]

I have a question about TrueNAS Scale.
I have 2 boot drives installed on my NAS (SSD and USB).
The mirror is on a USB stick, which is now probably defective.
I want to replace it with an SSD disk. When trying to "REPLACE" I get the following error message:
Error: [EZFS_BADTARGET] cannot replace 7893187123417559304 with /dev/sdg3: already in replacing/spare config; wait for completion or use 'zpool detach'.
How do I proceed?
(A simple explanation would be great, as I am not an expert).


Many Thanks!!

Adlatus.



Version:
TrueNAS-SCALE-22.12.3.2