Praise be to Allah.
The one who changes his name does not have to offer ‘aqeeqah again on his own behalf.
It says in Majmoo‘ Fataawa Ibn ‘Uthaymeen (10850): Changing one’s name to something that is permissible is better if the name has an inappropriate meaning, as the Prophet (blessings and peace of Allah be upon him) changed some names to permissible meanings. That does not require repeating the ‘aqeeqah, as some of the common folk think. End quote.
And Allah knows best.