Getting [/inputs/index_filter]: must NOT have additional properties when I'm trying to save the dashboard below.

[NanSplk01]

{

    "title": "Index Ownership Lookup",

    "description": "Search index ownership and contact details from CSV lookup data.",

    "theme": "light",

    "inputs": {

        "index_filter": {

             "type": "input.text",

             "title": "Search Index Name",

             "token": "index_filter",

             "defaultValue": ""

             }

    },

    "dataSources": {

        "ds_index_lookup": {

            "type": "ds.search",

            "options": {

                "query": "| inputlookup index_ownership.csv | eval index_lc=lower(index) | where \"$index_filter$\"=\"\" OR like(index_lc, \"%\" . lower(\"$index_filter$\") . \"%\") | fields index Owner Contact | sort index"

            }

        }

    },

    "visualizations": {

        "index_table": {

            "type": "splunk.table",

            "dataSources": {

                "primary": "ds_index_lookup"

            },

            "options": {

                "rowNumbers": true,

                "wrap": true,

                "cellPadding": "compact"

            }

        }

    },

    "layout": {

        "tabs": {

            "items": [

                {

                    "layoutId": "layout_1",

                    "label": "New tab"

                }

            ]

        },

        "layoutDefinitions": {

            "layout_1": {

                "type": "absolute",

                "structure": [

                    {

                        "item": "index_table",

                        "type": "block",

                        "position": {

                            "x": 0,

                            "y": 0,

                            "w": 1440,

                            "h": 650

                        }

                    }

                ]

            }

        }

    }

}

I have tried taking out the extra properties, but it just gives me a different error.  This dashboard will be reading a csv file which does exist.  How can I fix this so that the app will run?

[ITWhisperer]

Try like this

    "inputs": {
        "index_filter": {
             "type": "input.text",
             "title": "Search Index Name",
             "options": {
                  "token": "index_filter",
                  "defaultValue": ""
             }
        }
    },

[NanSplk01]

Unfortunately adding that gives me:  

[Error: Input is not present in the global inputs structure or layout structure]: Input "index_filter" is defined but not used in either the Global Inputs Structure or in any Layout Structure

 "inputs": {

        "index_filter": {

             "type": "input.text",

             "title": "Search Index Name",

             "options": {

                "token": "index_filter",

                "defaultValue": ""

                }

             }

    },

[ITWhisperer]

OK so the error message tells you what to do!

    "layout": {
        "globalInputs": [
            "index_filter"
        ],