When in CRM and go to add a new record, the option to add a "new opportunity" appears twice in the "New" menu.

Selecting either option takes you to the same place - the New Opportunity screen.

I found the following post https://community.sagecrm.com/user_community/f/84/t/9849.aspx which seems very similar however there is only one entry for this in the Custom_tabs table, which has a low ID and marking this as deleted in SQL results in removing both "New Opportunity" options from CRM even after Metadata refresh.

Administration | Advanced Customization | System Menus - there is only one option here also.

I amended the Translation on one and it changed both.

Therefore this looks to me to be a display issue but I can't find how to fix it.