Error in key for this row; refers to invalid list item
" Error in key for this row; refers to invalid list item : Headcount "
I get the above error when I tried to import data into Numbered List, which is uniquely identified by combination of properties. Actually, the list item which is formatted by some "xyz" list has list item ' Headcount'
Even after that, I am getting the same error. Can anyone please help me on this?