As "required:true" parse error when it in requestBody's properties? But openai plugin validate passed.

[ezhishui]

Such as plugin like this:

https://qr.mixerbox.com/.well-known/openapi.json

When i parse the openapi.json with kin-openapi tools, the error was :panic: error unmarshaling JSON: while decoding JSON: json: cannot unmarshal bool into Go struct field TBis.paths of type []string. I confirmed that is was cause by

"requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "type": "object",
                                "properties": {
                                    "url": {
                                        "type": "string",
                                        "description": "The link provided by the user, used for converting to QRcode.",
                                        "required": true -----this property cause,by this plugin is valid in openai plugin center,why?
                                    },
                                    "darkColor": {
                                        "type": "string",
                                        "description": "The default value is #000000, color of the dark module. The value must be in hex format (RGB)."
                                    }

And if i remove "required": true to the properties level ,and changed to array, it was validated passed with kin-openai, why it is a valid yaml in openai?3.0.1 or 3.1.0 specs?