Pb installation (volume fait partie d'un système incomplet)

Bonjour
J'ai voulu réinstaller mon Macbook air et lorsque je veux ios cela me mets : le volume cible fait partie d'un système incomplet et ne peut pas faire l'objet d'une installation.
Voilà ce que m'indique la commande Diskutill list:
-bash-3.2# diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *121.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk1 121.1 GB disk0s2

/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +121.1 GB disk1
Physical Store disk0s2
1: APFS Volume Preboot 81.0 MB disk1s2
2: APFS Volume Recovery 528.9 MB disk1s3
3: APFS Volume VM 1.1 GB disk1s4
4: APFS Volume Sans titre 10.8 GB disk1s5

/dev/disk2 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme +2.1 GB disk2
1: Apple_HFS macOS Base System 2.0 GB disk2s1

/dev/disk3 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +10.5 MB disk3

/dev/disk4 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +10.5 MB disk4

/dev/disk5 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk5

/dev/disk6 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk6

/dev/disk7 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk7

/dev/disk8 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +2.1 MB disk8

/dev/disk9 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk9

/dev/disk10 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk10

/dev/disk11 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +12.6 MB disk11

/dev/disk12 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +4.2 MB disk12

/dev/disk13 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +1.0 MB disk13

/dev/disk14 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +2.1 MB disk14

/dev/disk15 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk15

/dev/disk16 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +2.1 MB disk16

/dev/disk17 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk17

/dev/disk18 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +1.0 MB disk18

/dev/disk19 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk19

/dev/disk20 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +6.3 MB disk20

/dev/disk21 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +6.3 MB disk21

/dev/disk22 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +524.3 KB disk22

/dev/disk23 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: untitled +2.1 MB disk23

-bash-3.2#

Help me svp