Can't rename .filepart

Using session As New Session
    ' Connect
    session.Open(sessionOptions)
 
    ' Set up transfer options
    Dim transferOptions As New TransferOptions
    With transferOptions
        .ResumeSupport = New TransferResumeSupport With {.State = TransferResumeSupportState.Off}
    End With
 
    ' Transfer files
    session.PutFiles(filepath, "/To/*").Check()
End Using

WinSCP.SessionRemoteException
  HResult=0x80131500
  Message=Transfer was successfully finished, but temporary transfer file 'p-20220929-239-0-0-0.txttest.pgp.filepart' could not be renamed to target file name 'p-20220929-239-0-0-0.txttest.pgp'. If the problem persists, you may try to turn off transfer resume support.

session.PutFiles(filepath, "/To/*", False, transferOptions).Check()