[Koha] Accession No. and Barcode filed mapping

Hi all, I have mapped 952$p with unique serial of barcode for circulation (e.g. LIB1000101, LIB1000102, LIB1000102)... I also have Accession no. (e.g. 254123, 19982, 05241) please guide me what field I'll use for accession no. mapping (as i already have a 952$p for serial barcode) Kind regards, Syed