Two entries for 'Audiobook' at genre drop down

[dirdi]

For Audiobooks there are two identical entries at the drop down list:

[ohrenkino]

see here:

Two identical items «Audiobook» in v3.00 genre list

I can see two identical items «Audiobook» in a drop-down list of genres of version 3.00. I used this item in a previous version 2.83 but there was only one. The second item apperared after updating to version 3.00. How can I remove an extra item from the list?