Why do I see a Fringe Benefit Actual Adjustment on an FDM string that was not used as part of a Payroll Accounting Adjustment (PAA)?

When a PAA is processed, fringe “follows” the updated distribution for the pay period, but when the reallocation of fringe benefits occurs, Workday reverses the entire original fringe journal and recalculates, even if the worktag combination was not used in the most recent PAA for salaries/wages.