Spring data JPA findFirst,findTop doesnt work
<p>According to <a href="http://docs.spring.io/spring-data/jpa/docs/current/reference/html/#repositories.limit-query-result" rel="noreferrer">section 3.4.5</a> of the Spring Data JPA documentation, the results of a query method can be limited by using the keyword <code>first</code> and <code>top</code>.</p>

<p>I have written my code like this:</p>

<pre><code>SysPrefixName findFirstByTableName(String tableName);
</code></pre>

<p>However, I get this error when I run the code:</p>

<blockquote>
  <p>result returns more than one elements; nested exception is javax.persistence.NonUniqueResultException: result returns more than one elements</p>
</blockquote>

<p>Any help on resolving this will be appreciated.</p>