Incorrect form Configuration for using tags (embeds 'tag' as field)

gistfile1.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<div xmlns:c="http://java.sun.com/jsp/jstl/core" 
     xmlns:field="urn:jsptagdir:/WEB-INF/tags/form/fields" 
    xmlns:form="urn:jsptagdir:/WEB-INF/tags/form" 
    xmlns:jsp="http://java.sun.com/JSP/Page" 
    xmlns:spring="http://www.springframework.org/tags" version="2.0">
    <jsp:directive.page contentType="text/html;charset=UTF-8"/>
    <jsp:output omit-xml-declaration="yes"/>

    <form:create id="fc_com_t_coursemanager_model_Tag" modelAttribute="tag" 
    			path="/tags" render="${empty dependencies}" z="iEN6IpcwJNLAdWyV0NryBgtaoCA=">
    			
        <field:textarea 
        		field="description" id="c_com_t_coursemanager_model_Tag_description" 
        		required="true" z="VfNxpepXRMSqsZWFm1V3Dv56/HY="/>
        		
        <field:select field="courses" 
        		id="c_com_t_coursemanager_model_Tag_courses" itemValue="id" 
        		items="${courses}" multiple="true" path="/courses" z="8tZwfpWu9u0Ue8afB3hj8Rt5BFA="/>

        <field:input field="tag" id="c_com_t_coursemanager_model_Tag_tag" 
        		max="25" min="1" required="true" z="S879krSFxEB+VoidxCCA+51q7Co="/>

    </form:create>

    <form:dependency dependencies="${dependencies}" 
    		id="d_com_t_coursemanager_model_Tag" render="${not empty dependencies}"    		
    		z="1+IvaryYav1iXp7q9gIPlhmFp5c="/>
</div>