Please help me understand what this entry could mean. Why would there be a credit to Goodwill? What does that mean when there's a credit to Goodwill?

Why is there a debit to Additional Paid in Capital? What is Additional Paid in Capital? Why would you make a debit to this account?

1 2 3 4 5 A B Date Num 10/01/2019 9-37R 10/01/2019 9-37R 10/01/2019 9-37R C Memo Reverse of GJE 9-37 -- Pd. Kevin Murphy on 4/17/2019-true-up for purchase Pd. Kevin Murphy on 4/17/2019-true-up for purchase D Account 1850. Goodwill 2720 - Additional Paid In Capital E F Debit Credit 8,684.29 8,684.29 8,684.298,684.29