migration OMV 2.x to omv 4.x

Hello

I just upgraded from omv 2 to omv 4 (fresh install) and I have a small problem.
When the installation was finished, I have plug my disks (ext4), there are visible on disks tab but not in the filesystem tab.

result of lsblk -f :

root@NAS:~# lsblk -f
NAME   FSTYPE     LABEL UUID                                 MOUNTPOINT
sda
├─sda1 ext4             7d5820c1-9014-4c3c-a4b3-e83d9c6ec952 /
├─sda2
└─sda5 swap             43de1bce-9328-46a5-a54d-966416ec508e [SWAP]
sdb    zfs_member
└─sdb1 zfs_member

I don't understand why partition is zfs_member instead of ext4.

PS : I formated a disk to test and create new partition and the end of the process, same "zfs_member"...
Thx for your help

I tried and yes apparently it worked for this disk, but it forced me to format, and I don't want to do that for my other disks...
Can I use the wipefs and don't format after ?

No not ZFS plugin installed.

All disk ok after "wipefs -a /dev/sdx" and a quick format
last one, I will try to keep data and do not format

root@NAS:~# lsblk -f
NAME   FSTYPE     LABEL  UUID                                 MOUNTPOINT
sda
├─sda1 ext4              7d5820c1-9014-4c3c-a4b3-e83d9c6ec952 /
├─sda2
└─sda5 swap              43de1bce-9328-46a5-a54d-966416ec508e [SWAP]
sdb
└─sdb1 ext4       movies 93f14fe8-19a1-4ba9-b142-19903c05d034 /srv/dev-disk-by-label-movies
sdc    zfs_member
└─sdc1 zfs_member
sdd
└─sdd1 ext4       data   a709e365-9dca-4b3f-8be6-68d8576fe0ce /srv/dev-disk-by-label-data
sde
└─sde1 ext4       photos b833e5e5-69cb-47e9-b81d-94c339f48966 /srv/dev-disk-by-label-photos

result of the wipefs /dev/sdc :

root@NAS:~# wipefs /dev/sdc
offset               type
----------------------------------------------------------------
0x200                gpt   [partition table]


0xe8e0c3fc00         zfs_member   [filesystem]

I think, if I try wipefs -a, I should format my disk, I don't know if I have another solution ?