error: openapi.yaml can't pass the openapi-generator-cli validate

openai-api$ openapi-generator-cli validate -i openapi.yaml
Validating spec (openapi.yaml)
[main] ERROR o.o.codegen.utils.ModelUtils - Undefined array inner type for null. Default to String.
[main] ERROR o.o.codegen.utils.ModelUtils - Undefined array inner type for null. Default to String.
[main] ERROR o.o.codegen.utils.ModelUtils - Undefined array inner type for null. Default to String.
[main] ERROR o.o.codegen.utils.ModelUtils - Undefined array inner type for null. Default to String.
Errors:
- attribute components.schemas.EvalScoreModelGrader.max_items is unexpected
- attribute components.schemas.TranscriptTextDeltaEvent.items is missing
- attribute components.schemas.Eval.default is not of type array
- attribute components.schemas.TranscriptionInclude.default is not of type string
- attribute components.schemas.ChatCompletionStreamOptions.default is not of type object
- attribute components.schemas.RealtimeSessionCreateRequest.default is not of type object
- attribute components.schemas.VectorStoreFileAttributes.propertyNames is unexpected
- attribute components.schemas.CreateTranscriptionResponseJson.optional is unexpected
- attribute components.schemas.RealtimeSession.default is not of type object
- paths.'/organization/certificates/{certificate_id}'. Declared path parameter
certificate_id needs to be defined as a path parameter in path or operation level
- attribute components.schemas.TranscriptTextDoneEvent.items is missing
- attribute components.schemas.RealtimeTranscriptionSessionCreateRequest.default is not of
type object
- attribute components.schemas.CompoundFilter.$recursiveRef is unexpected
- paths.'/organization/projects/{project_id}/certificates/activate'. Declared path parameter
project_id needs to be defined as a path parameter in path or operation level
- paths.'/organization/projects/{project_id}/certificates'. Declared path parameter
project_id needs to be defined as a path parameter in path or operation level
- attribute components.schemas.EvalScoreModelGrader.min_items is unexpected
- attribute components.schemas.CompoundFilter.$recursiveAnchor is unexpected
- attribute components.schemas.CreateChatCompletionRequest.default is not of type object
- attribute components.schemas.CreateCompletionRequest.default is not of type object
- paths.'/organization/projects/{project_id}/certificates/deactivate'. Declared path
parameter project_id needs to be defined as a path parameter in path or operation level
Warnings:
- Unused model: RealtimeServerEventResponseDone
- Unused model: OutputAudio
- Unused model: MessageDeltaContentTextObject
- Unused model: RealtimeServerEventResponseOutputItemAdded
- Unused model: RunStepDeltaStepDetailsToolCallsFunctionObject
- Unused model: RealtimeClientEventSessionUpdate
- Unused model: RealtimeServerEventConversationItemInputAudioTranscriptionFailed
- Unused model: FineTunePreferenceRequestInput
- Unused model: RunStepDeltaStepDetailsToolCallsFileSearchObject
- Unused model: ModelIds
- Unused model: RealtimeConversationItem
- Unused model: BatchRequestOutput
- Unused model: RealtimeServerEventResponseOutputItemDone
- Unused model: RealtimeServerEventResponseTextDelta
- Unused model: RealtimeServerEventConversationItemInputAudioTranscriptionCompleted
- Unused model: BatchRequestInput
- Unused model: LogProbProperties
- Unused model: RealtimeClientEventInputAudioBufferClear
- Unused model: RealtimeServerEventInputAudioBufferCleared
- Unused model: RealtimeResponseCreateParams
- Unused model: RealtimeServerEvent
- Unused model: RealtimeServerEventConversationCreated
- Unused model: RealtimeServerEventError
- Unused model: RunStepDeltaStepDetailsMessageCreationObject
- Unused model: RealtimeClientEventConversationItemCreate
- Unused model: ChatCompletionRole
- Unused model: ErrorEvent
- Unused model: MessageDeltaContentImageUrlObject
- Unused model: RunStepDeltaStepDetailsToolCallsObject
- Unused model: RealtimeClientEventConversationItemRetrieve
- Unused model: RealtimeClientEventInputAudioBufferCommit
- Unused model: RealtimeServerEventOutputAudioBufferCleared
- Unused model: RealtimeClientEventConversationItemTruncate
- Unused model: MessageDeltaContentTextAnnotationsFilePathObject
- Unused model: RealtimeServerEventInputAudioBufferCommitted
- Unused model: RealtimeClientEventInputAudioBufferAppend
- Unused model: RealtimeServerEventConversationItemCreated
- Unused model: RealtimeServerEventTranscriptionSessionUpdated
- Unused model: RunStepDeltaObject
- Unused model: AssistantStreamEvent
- Unused model: RunStepDeltaStepDetailsToolCallsCodeObject
- Unused model: ThreadStreamEvent
- Unused model: RealtimeServerEventResponseTextDone
- Unused model: Content
- Unused model: DoneEvent
- Unused model: RealtimeServerEventInputAudioBufferSpeechStarted
- Unused model: MessageDeltaContentRefusalObject
- Unused model: RealtimeServerEventResponseContentPartDone
- Unused model: RealtimeServerEventConversationItemRetrieved
- Unused model: RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject
- Unused model: RealtimeClientEventResponseCancel
- Unused model: RealtimeServerEventResponseCreated
- Unused model: MessageDeltaObject
- Unused model: RealtimeServerEventResponseAudioTranscriptDone
- Unused model: RealtimeServerEventSessionUpdated
- Unused model: FineTuneCompletionRequestInput
- Unused model: RealtimeClientEventTranscriptionSessionUpdate
- Unused model: RunStepStreamEvent
- Unused model: RealtimeServerEventResponseAudioDelta
- Unused model: RealtimeServerEventResponseAudioTranscriptDelta
- Unused model: RealtimeResponse
- Unused model: RealtimeServerEventInputAudioBufferSpeechStopped
- Unused model: RealtimeServerEventConversationItemTruncated
- Unused model: MessageDeltaContentTextAnnotationsFileCitationObject
- Unused model: RealtimeClientEventResponseCreate
- Unused model: RealtimeConversationItemWithReference
- Unused model: ChatCompletionModalities
- Unused model: FineTuneChatCompletionRequestAssistantMessage
- Unused model: RealtimeServerEventRateLimitsUpdated
- Unused model: RealtimeClientEventOutputAudioBufferClear
- Unused model: FineTuneChatRequestInput
- Unused model: MessageStreamEvent
- Unused model: RealtimeServerEventResponseAudioDone
- Unused model: MessageDeltaContentImageFileObject
- Unused model: RealtimeServerEventConversationItemDeleted
- Unused model: RealtimeServerEventSessionCreated
- Unused model: RealtimeServerEventResponseContentPartAdded
- Unused model: InputAudio
- Unused model: RealtimeServerEventOutputAudioBufferStarted
- Unused model: RealtimeServerEventOutputAudioBufferStopped
- Unused model: RunStreamEvent
- Unused model: RealtimeServerEventConversationItemInputAudioTranscriptionDelta
- Unused model: RealtimeClientEventConversationItemDelete
- Unused model: RealtimeServerEventResponseFunctionCallArgumentsDone
- Unused model: RealtimeServerEventResponseFunctionCallArgumentsDelta
- Unused model: RealtimeSession
- Unused model: RunStepDeltaStepDetailsToolCallsCodeOutputImageObject
- Unused model: RealtimeClientEvent

[error] Spec has 20 errors.

Start by running openapi-generator-cli validate -i openapi.yaml and inspect the listed schema and path-parameter errors in openapi.yaml. Check each of the 20 reported errors, including invalid defaults, missing array items, unexpected attributes, and undefined path parameters. Done means validation completes without errors.