How to change the fund status of a journal in closed period to unreserved

Summary:

We have a bunch of invoices transferred from AP to GL but not posted.

The period in which the journals were transferred was closed and the business do not want to reopen it.

We want the journals to be posted in the current open period, but we are unable to edit the accounting period for these despite the journal source is unfrozen due to the fund status, which is "reserved in subledger".

We want to know how the fund status can be unreserved so we can edit the accounting period for these journals.

Attached document has necessary screenshots for reference.