I have just installed Koha 2.2.7. However after defining the MARC structure and doing a MARC check, I got the following error.

OK	itemnum : the field itemnumber is mapped to a field in tab -1
item fields	ALL items fields MUST : be mapped to the same tag, and they must all be in the 10 (items) tab
OK	Only 1 MARC tag mapped to items
OK	biblioitems.itemtype defined
OK	itemtypes defined
OK	homebranch defined
OK	holdingbranch defined
OK	biblionumber and biblioitemnumber mapped correctly
OK	no NULL value in frameworkcode
TOTAL	You have 1 error(s) in your MARC configuration. Please fix them before using Koha

Has somebody come across the same error and how can it be resolved.

Mary