Why are Ahimelech and Abiathar reversed in 2 Sam. 8:17?

In 1 Samuel 22:20-23, we see that Ahimelech was killed by the order of Saul and his son Abiathar escaped: > 20 But one son of Ahimelech the son of Ahitub, named Abiathar, escaped > and fled after David. 21 Abiathar told David that Saul had killed the > priests of the LORD. 22 Then David said to Abiathar, “I knew on that > day, when Doeg the Edomite was there, that he would surely tell Saul. > I have brought about the death of every person in your father’s > household. 23 “Stay with me; do not be afraid, for he who seeks my > life seeks your life, for you are safe with me.” However, in 2 Samuel 8:17, Ahimelech is referenced as one of David's priests, and the *son* of Abiathar: >17 and Zadok the son of Ahitub and Ahimelech the son of Abiathar were priests, and Seraiah was secretary, Obviously both can't be true, but I can't seem to find any compelling information that would explain this reversal of names.