This happens when a P&L nominal account's Year End code points to the wrong nominal account. When the year end runs, the P&L account clears into that wrong account.
Journal the values from the incorrect year end account into the correct one.
Then update the Year End code on the nominal account to prevent this recurring:
Click Financials, then click Accounts.
Select the account that needs amending.
Click Edit.
On the Settings tab, update the P&L Year End Code to the required nominal account.
Click Save.