Why did the PAIGC become the PAICV in Cabo Verde?

The African Party for the Independence of Guinea and Cabo Verde (PAIGC) transitioned into the African Party for the Independence of Cabo Verde (PAICV) following a political rupture between the two nations.1

Initially, the PAIGC served as a joint movement seeking independence for both Guinea-Bissau and Cabo Verde from Portugal. However, in 1980, a military coup occurred in Guinea-Bissau that was deeply resented by the leadership in Cabo Verde. This event effectively broke the political unity that had existed between the two countries, leading to the split of the PAIGC and the subsequent formation of the PAICV as the independent Cabo Verdean branch of the party.21