[Koha] MARC check - item fields error

[Mary.Gachihi at kra.go.ke]

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
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