Duplicate ID in plink

Question

[lincaijin1994]

xxx@ubuntu:~/Biosoft/plink$ ./plink \
> --bfile ~/lcj/bc_anhui/PLINK-Data/breast-qc \
> --clump-p1 1 \
> --clump-r2 0.1 \
> --clump-kb 250 \
> --clump ~/lcj/bc_anhui/PLINK-Data/breast2.assoc \
> --clump-snp-field SNP \
> --clump-field P \
> --out breast-anhui

It returns an error

Error: Duplicate ID 'rs3737665'.

I dont know how to find and remove the duplicate ID. Thank you.

[4galaxy77]

Duplicate ID in bed file