There were duplicate row identifiers in the specified ranked list. One id was arbitarilly choosen. Details are below.
Generally, this is OK, but if you want to avoid this automagic, edit your ranked list so that all row ids are unique
# of row ids in original dataset: 2894
# of row UNIQUE ids in original dataset: 2857
# The duplicates were
Mbp
Mbp
Ahnak2
Mrps36
Tpm1
Hnrnpdl
Map4
Tpd52l2
Tpm1
Tpm3
Psip1
Calu
Mbp
Cadm1
Ank2
Ncam1
Syt1
Epb4.1l1
Ank2
Clta
Tpr
Pcdh1
Nfasc
Epn2
Rap1gds1
Mtdh
Ncam1
Opcml
Mapt
Ndrg4
Syt7
Cnbp
Ank3
Gnb2
Mecp2
Sptan1
Gnb2