Amortization Expense Schedule Locked for Processing Error

In testing Amortization Expense functionality, I've accidentally clicked the Stage button on an Amortization Schedule (General Ledger > Journals > Pre-Amortization Journals > Amortization Schedule) twice, causing the Amortization ID in question to begin throwing a "Amortization Schedule is locked for processing (5940,7)" error message. I cannot seem to find a page to unlock the schedule. Attempting to generate the journals for this schedule returns nothing. I can see in the PS_AMR_SCH_HDR record that this Amortization ID now has a LOCKOUT_FLG = Y.

How can I unlock the Amortization ID? Thank you.