Cant remove playstation past name alias

Hello.I dont want people to see my past name on ubisoft or my playstation account just from the tracker network.How do I remove it.I know there is a button to remove it but once I verify my ubisoft I still cannot see the option/yellow button below.I would like both psn and pc past aliases removed.Is there someone that could kindly do this for me ? :blush: Thanks !