Why is the "plug" is considered to have an accounting class of "liability"?

Summary:

The "plug" is considered to have an accounting class of "liability" - do you know why this is the case? As the amount is a net debit in the entry, I would have expected we would create the clearing account to be an asset vs. debiting a liability (contra-liability)?

• Can you please provide some guidance/resources on future treatment of this BS clearing/adjustment account? it can't remain on the balance sheet forever and should not be expensed to the P&L either as it's not a true expense? It's simply a byproduct of the "math" within the amortization schedules of the difference in the base rent amortization (straight line) and interest amortization (effective interest method).