EventType deprecated but present as required in EventSchema

Hi,

I'm using Event.v1_4_0 from Schema set 2019.1.

EventType has been deprecated from version v1_3_0 in this schema as given below:-

"EventType": {
"$ref": "http://redfish.dmtf.org/schemas/v1/Event.json#/definitions/EventType",
"deprecated": "This property has been deprecated. Starting Redfish Spec 1.6 (Event 1.3), subscriptions are based on RegistryId and ResourceType and not EventType.",
"description": "This indicates the type of event sent, according to the definitions in the EventService.",
"longDescription": "The value of this property shall indicate the type of event as defined in the EventService schema.",
"readonly": true,
"versionDeprecated": "v1_3_0"
},

But is still in the required or mandatory property list in Event.v1_4_0.

"required": [
"EventType",
"MessageId",
"MemberId"
],

Kindly help to clarify this.

Thanks.