TIDEP-01012: Reformating SSD - WARNING: rereading partion table failed,...

Dear everyone,

We are currently struggeling with our TIDEP-01012 and tried to reset everything to "factory setting". Therefore, we wanted to process as described in mmWave Studio Cascade, Chapter 6 (Formatting the SSD). We did the following:

1. ls /dev/nvme*
           /dev/nvne0     /dev/nvme0n1      /dev/nvme0n1p1

2. fdisk /dev/nvme0n1

3. d (delete a partition)

4. n (add a new partition)

5. p (print the partition table)

6. 1 (partition number)

7. 2x <press enter for default>

8. p (print the partition table)

9. w (write table to disk and exit)

At the last step we receive the following message:

The partition table has been altered.
Calling ioctl() to re-read partition table
fdisk: WARNING: rereading partition table failed, kernel still uses old table: Device or resource busy

What could be the reason and what did we do wrong?

Thanks for your help.

Best, Andreas