AR custom invoice template

Summary:

we are creating a new invoice template for AR business unit (xxxxxxxxx xxxxxxxx xxxxxxxxx BU) but when adding the Business unit name to the look up code (Lookup_type - ARBPA_SELECT_INV_TEMPLATE)we have a limit of 30 characters so we are unable to add the full name of the BU which is affecting the invoice template. Is there way to add?

submitted the Print Receivables Transactions program, selected the invoice template name Custom Invoice Template the "View Image" section of AR invoice picking Custom template along with BU.

But whereas single invoice click on complete and review