Hi, can anyone help me with this, why I getting this error - "Unknown column 'b.marcxml' in 'field list'"

SELECT old_issues.*, borrowers.cardnumber, borrowers.surname,
       borrowers.firstname, borrowers.sort1, borrowers.sort2, items.barcode,
       items.datelastborrowed, items.datelastseen, items.itemcallnumber,
       items.issues, items.holdingbranch, items.location, items.permanent_location,
       items.onloan, items.ccode, items.itype, items.enumchron, items.copynumber,
       items.location, b.totalissues, EXTRACTVALUE( b.marcxml, '//datafield[@tag="245"]/subfield[@code>="a"]' ) as TITLE 
FROM old_issues
LEFT JOIN borrowers ON ( borrowers.borrowernumber = old_issues.borrowernumber ) 
LEFT JOIN items ON ( items.itemnumber = old_issues.itemnumber ) 
LEFT JOIN biblioitems AS b ON ( items.biblioitemnumber = b.biblioitemnumber)

Please Help