AssertionError : assert current_gene not in gene_ids

[rnaomics]

I am using mm9 annotation file. I found that some gene ids occur in multiple locations. This causes the following error.

Traceback (most recent call last):
File "/data/groups/anko/mohamed/Install_packages/miniconda3/envs/env_nf/lib/python3.9/site-packages/iCount/cli.py", line 444, in main
result_object = func(**args)
File "/data/groups/anko/mohamed/Install_packages/miniconda3/envs/env_nf/lib/python3.9/site-packages/iCount/genomes/segment.py", line 724, in get_segments
for gene_content in _get_gene_content(annotation, chromosomes, report_progress):
File "/data/groups/anko/mohamed/Install_packages/miniconda3/envs/env_nf/lib/python3.9/site-packages/iCount/genomes/segment.py", line 633, in _get_gene_content
assert current_gene not in gene_ids
AssertionError