How to update the "Unapplied Receipts" account if greyed out?

Summary:

I am needed to update the account for the "Unapplied Receipts" in "Edit Remittance Bank Account", but all the accounts are greyed out and cannot be edited.

Content (required):

Hi,

I am needed to update the account for the "Unapplied Receipts" in "Edit Remittance Bank Account", but all the accounts are greyed out and cannot be edited.

I have also for a single entity the accounts that are not greyed out, i was looking to see if there are differences between these accounts, but i could not find.

How can i update these accounts?

Thank you,

Teodora

Version (include the version you are using, if applicable):