Unable to run Bootcamp. Bootcamp unable to read windows partition

I used to have a running windows 10 partition in the past, which I deleted months ago (not sure if I removed it properly?).

However, when I now try to run bootcamp to install Windows 10 again, I get the error message :

(I get this message right after starting bootcamp and hitting continue on the introduction window, then after the error message it takes me back to introduction)

Unable to read the Windows partition

Boot Camp Assistant was unable to verify if the Windows partition contains a Windows installation. This may be because BitLocker is enabled on the partition. If so, disable BitLocker on the disk before removing Boot Camp.

diskutil reads :

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *251.0 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:                 Apple_APFS Container disk1         250.3 GB   disk0s2

   3:           Windows Recovery                         510.7 MB   disk0s3

/dev/disk1 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +250.3 GB   disk1

                                 Physical Store disk0s2

   1:                APFS Volume Macintosh HD - Data     129.7 GB   disk1s1

   2:                APFS Volume Preboot                 81.4 MB    disk1s2

   3:                APFS Volume Recovery                528.1 MB   disk1s3

   4:                APFS Volume VM                      2.1 GB     disk1s4

   5:                APFS Volume Macintosh HD            11.2 GB    disk1s5

Please help.

Thanks.