The CWE ID: 89 vulnerability, also known as SQL injection, can allow an attacker to manipulate an SQL query and gain unauthorized access to data. It is important to address this vulnerability in your application. Here are some steps to fix this issue:

1. Use parameterized queries instead of dynamic queries with concatenated strings. This will prevent SQL injection attacks by properly escaping special characters and ensuring that user input is treated as data and not as code.
2. If parameterized queries are not possible with the JDBC driver you are using, consider using a library or framework that provides a safe way to construct dynamic SQL queries.
3. If neither of the above options is feasible, you can sanitize the input by validating the values and using a whitelist to ensure that only expected values are allowed. This can be done by checking each value against a list of valid values before constructing the query.
4. Another option is to use stored procedures instead of dynamic SQL queries. Stored procedures allow for parameterized queries and are a safer way to interact with the database.
5. Regularly review and update your code to ensure that all queries are properly secured against SQL injection attacks.

Overall, the key is to avoid using concatenated strings to construct queries, and instead use parameterized queries, stored procedures or a safe library/framework.