ISM rollover policy and data streams, how (missing rollover allias)?

Plugins Index Management
1

Hi there,
i have several data streams here, that i want to control via ISM rollover policy.
Created this ISM policy, but when i want to assign it to the data stream index, i get the warning that the rollover alias is missing. I thought this was not necessary for data streams.

        "default_state": "hot",
        "states": [
            {
                "name": "hot",
                "actions": [
                    {
                        "rollover": {
                            "min_size": "50gb",
                            "min_index_age": "30d"
                        }
                    }
                ],
                "transitions": [
                    {
                        "state_name": "cold"
                    }
                ]
            },
            {
                "name": "cold",
                "actions": [
                    {
                        "read_only": {}
                    },
                    {
                        "index_priority": {
                            "priority": 0
                        }
                    },
                    {
                        "force_merge": {
                            "max_num_segments": 1
                        }
                    }
                ],
                "transitions": [
                    {
                        "state_name": "delete",
                        "conditions": {
                            "min_index_age": "90d"
                        }
                    }
                ]
            },
            {
                "name": "delete",
                "actions": [
                    {
                        "delete": {}
                    }
                ],
                "transitions": []
            }
        ],
        "ism_template": [
            {
                "index_patterns": [
                    "logs-*"
                ],
                "priority": 50,
                "last_updated_time": 1639485301867
            }
        ]
    }
}