Error creating bean with name messageSource

        Error creating bean with name messageSource defined in class path resource spring.xml: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property prop of bean class org.springframework.context.support.ResourceBundleMessageSource: Bean property prop is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1396)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1118)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)

at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)

<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">

 <property name="prop">

   <list>

     <value>dbprop</value>

   </list>

 </property>