One of the solos cannot be updated. Writing the firmware aborts.

[Patterchen]

Hi,
I have a probleme with one of my two solo2 keys. The firmware cannot be updated on my second Solo.

Tap button on key to confirm, or replug to abort...
LPC55 Bootloader detected. The LED should be off.
Writing new firmware...
█████████████████████████████████████████████████████████████████████████████████████████████████████████░ 310080/310672aborting
thread 'main' panicked at C:\Users******.cargo\registry\src\index.crates.io-*************\lpc55-0.2.1\src\bootloader\protocol.rs:299:29:
unexpected status SbLoader(Signature)
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

I have no idea how I can fix the problem.

Can you help me?