[Koha] Call number appearing in Bib record but not in Item

Hi All, I have imported a records from an Excel file to Koha. My major challenge now is that call numbers are appearing on bib records but not on item records. I am aware there is a settings that you have to setup for the item records to pick the call number form bib. I will appreciate any hint. Regards, Admire Mutsikiwa University of Zimbabwe