Symptoms

• When doing a JQL search for an issue, fields with the same name are displayed although one of them is obsolete and not used (see screenshot below).

Cause

• A new custom field was created to replace an existing one which has the same name. The obsolete field has its Search Template set to Free Text Searcher instead of None.

Solution

• Set the Search Template of the obsolete field to None.
• Do a Background re-index during a non-busy period.