What is the meaning of this Invalid Schema error?

[Duncan_Groenewald]

The schema seems to get created despite this error.

And these errors as well

And for completion here is the resulting Vendor schema

    {
  "title": "Vendor",
  "bsonType": "object",
  "required": [
    "_id",
    "_partitionKey",
    "tstamp",
    "isDeleted",
    "code",
    "name",
    "labelName",
    "details",
    "filter"
  ],
  "properties": {
    "_id": {
      "bsonType": "string"
    },
    "_partitionKey": {
      "bsonType": "string"
    },
    "tstamp": {
      "bsonType": "date"
    },
    "isDeleted": {
      "bsonType": "bool"
    },
    "code": {
      "bsonType": "string"
    },
    "name": {
      "bsonType": "string"
    },
    "labelName": {
      "bsonType": "string"
    },
    "details": {
      "bsonType": "string"
    },
    "filter": {
      "bsonType": "string"
    },
    "brands": {
      "bsonType": "array",
      "items": {
        "bsonType": "string"
      }
    },
    "products": {
      "bsonType": "array",
      "items": {
        "bsonType": "string"
      }
    }
  }
}

[Duncan_Groenewald]

Here is another one