I want to activate my CS767 II but it gives me that error =

(Error #29:Locked Order Number. Number of allowed activations has been exceeded. You must deactivate the software on your first device before transferring to another device. For details please visit)


I already contacted CS Support but with an different E-Mail (oskarweiss1105@icloud.com)


[I Updated to P3Dv5.4 and forgot to deativate the aircraft]