I'm using Flow JSON version 3.1. Recently, there was an update, and it broke the behavior of flows. It was working for me two days back. I have used the "-" (dash) character data model name; see the example below. I have a few flows with the same pattern, and all were working, but now the flow builder is showing Invalid Flow JSON, which is blocking further development. Even if this support is being dropped then, please continue to support for old flow JSON. Team, please have a look on this. Flow JSON for quick testing:

{
    "version": "3.1",
    "screens": [
        {
            "id": "identifierPanel",
            "terminal": true,
            "title": "${data.identifierPanel}",
            "refresh_on_back": false,
            "data": {
                "text-disclaimer": {
                    "type": "object",
                    "properties": {
                        "visible": {
                            "type": "boolean"
                        },
                        "value": {
                            "type": "string"
                        }
                    },
                    "__example__": {
                        "visible": true,
                        "value": "Disclaimer"
                    }
                },
                "disclaimer-text": {
                    "type": "object",
                    "properties": {
                        "visible": {
                            "type": "boolean"
                        },
                        "value": {
                            "type": "string"
                        }
                    },
                    "__example__": {
                        "visible": true,
                        "value": "some long disclaimer text"
                    }
                }
            },
            "layout": {
                "type": "SingleColumnLayout",
                "children": [
                    {
                        "children": [
                            {
                                "type": "TextCaption",
                                "visible": "${data.text-disclaimer.visible}",
                                "text": "${data.text-disclaimer.value}",
                                "strikethrough": false,
                                "font-weight": "normal"
                            },
                            {
                                "type": "TextCaption",
                                "visible": "${data.disclaimer-text.visible}",
                                "text": "${data.disclaimer-text.value}",
                                "strikethrough": false,
                                "font-weight": "normal"
                            },
                            {
                                "type": "Footer",
                                "label": "Continue",
                                "enabled": true,
                                "on-click-action": {
                                    "name": "data_exchange",
                                    "payload": {
                                    }
                                }
                            }
                        ],
                        "type": "Form",
                        "name": "identifierPanel"
                    }
                ]
            }
        }
    ],
    "data_api_version": "3.0",
    "routing_model": {}
}