Old automatic snapshots are not deleted

Bonjour,

I have a strange behaviour of my DBLab Engine in version 4 (v4.0.1-20250826-1008) compare to what I had in my instance in version 3.5: I have multiple snapshots per pool. When I try to remove the older snapshots, it says cannot destroy automatic snapshot in the pool.

[
    {
        "id": "dblab_pool/dataset_1@snapshot_20250903003023",
        "createdAt": "2025-09-03T01:29:05Z",
        "dataStateAt": "2025-09-03T00:30:23Z",
        "pool": "dblab_pool/dataset_1",
        "numClones": 0,
        "clones": [],
        "branch": "main",
        "message": "",
        "physicalSize": "0 B",
        "logicalSize": "54 GiB"
    },
    {
        "id": "dblab_pool/dataset_3@snapshot_20250901003023",
        "createdAt": "2025-09-01T01:29:21Z",
        "dataStateAt": "2025-09-01T00:30:23Z",
        "pool": "dblab_pool/dataset_3",
        "numClones": 0,
        "clones": [],
        "branch": "main",
        "message": "",
        "physicalSize": "0 B",
        "logicalSize": "42 GiB"
    },
    {
        "id": "dblab_pool/dataset_4@snapshot_20250829003023",
        "createdAt": "2025-08-29T01:29:57Z",
        "dataStateAt": "2025-08-29T00:30:23Z",
        "pool": "dblab_pool/dataset_4",
        "numClones": 0,
        "clones": [],
        "branch": "main",
        "message": "",
        "physicalSize": "0 B",
        "logicalSize": "42 GiB"
    },
    {
        "id": "dblab_pool/dataset_2@snapshot_20250827003023",
        "createdAt": "2025-08-27T01:28:16Z",
        "dataStateAt": "2025-08-27T00:30:23Z",
        "pool": "dblab_pool/dataset_2",
        "numClones": 0,
        "clones": [],
        "branch": "main",
        "message": "",
        "physicalSize": "1.9 MiB",
        "logicalSize": "42 GiB"
    },
    {
        "id": "dblab_pool/dataset_4@snapshot_20250826091044",
        "createdAt": "2025-08-26T10:04:27Z",
        "dataStateAt": "2025-08-26T09:10:44Z",
        "pool": "dblab_pool/dataset_4",
        "numClones": 0,
        "clones": [],
        "branch": "main",
        "message": "",
        "physicalSize": "27 GiB",
        "logicalSize": "42 GiB"
    },
    {
        "id": "dblab_pool/dataset_3@snapshot_20250826053024",
        "createdAt": "2025-08-26T06:24:14Z",
        "dataStateAt": "2025-08-26T05:30:24Z",
        "pool": "dblab_pool/dataset_3",
        "numClones": 0,
        "clones": [],
        "branch": "main",
        "message": "",
        "physicalSize": "27 GiB",
        "logicalSize": "42 GiB"
    },
    {
        "id": "dblab_pool/dataset_4@snapshot_20250825193023",
        "createdAt": "2025-08-25T20:24:05Z",
        "dataStateAt": "2025-08-25T19:30:23Z",
        "pool": "dblab_pool/dataset_4",
        "numClones": 0,
        "clones": [],
        "branch": "main",
        "message": "",
        "physicalSize": "27 GiB",
        "logicalSize": "42 GiB"
    },
    {
        "id": "dblab_pool/dataset_1@snapshot_20250825152848",
        "createdAt": "2025-08-25T16:21:44Z",
        "dataStateAt": "2025-08-25T15:28:48Z",
        "pool": "dblab_pool/dataset_1",
        "numClones": 0,
        "clones": [],
        "branch": "main",
        "message": "",
        "physicalSize": "38 GiB",
        "logicalSize": "53 GiB"
    }
]