In WebSphere Liberty’s server.xml, make sure your data source is set to non-transactional:

<dataSource id="myAppDatasource" 
            jndiName="jdbc/myAppDatasource" 
            transactional="false">
    <jdbcDriver ... /> <!-- Add driver details here -->
    <properties ... /> <!-- Add properties if needed -->
</dataSource>

Refer this document : https://openliberty.io/docs/latest/transaction-service.html