AzureDevOpsPipelineProcessor more than one automated approval on classical release pipelin

[adalfa]

Here the full Exception:
Error migrating ReleaseDefinition: - CD. Please migrate it manually.
Url: POST https://.vsrm.visualstudio.com///_apis/release/definitions/
{"$id":"1","innerException":null,"message":"Pre-approvals or post-approvals in stage '' have more than one automated approval. This is not allowed. Make sure pre-approvals or post-approvals have only one automated approval and try again.","typeName":"Microsoft.VisualStudio.Services.ReleaseManagement.Data.Exceptions.InvalidRequestException, Microsoft.VisualStudio.Services.ReleaseManagement2.Data","typeKey":"InvalidRequestException","errorCode":0,"eventId":3000}

the approval is unique and the trigger is manual in Pre-Approvals, I cannot make sense of the error, thanks