请问这个报错该怎么解决

<?xml version="1.0" encoding="UTF-8"?>

<teching-plan xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="hr.xsd">

<teching-plan>

<course id="001">

<course-name>大学英语</course-name>

<course-hours>36</course-hours>

<exam-form>考试</exam-form>

</course>

<course id="002">

<course-name>高等数学</course-name>

<course-hours>70</course-hours>

<exam-form>考试</exam-form>

</course>

<course id="003">

<course-name>计算机应用基础</course-name>

<course-hours>108</course-hours>

<exam-form>上机考试</exam-form>

</course>

</teching-plan>

<?xml version="1.0" encoding="UTF-8"?>

<schema xmlns="http://www.w3.org/2001/XMLSchema">

<element name="teching-plan">

<complexType>

<sequence>

<element name="course" minOccurs="1" maxOccurs="100">

<complexType>

<sequence>

<element name="course-name" type="string"></element>

<element name="course-hours">

<simpleType>

<restriction base="integer">

<minInclusive value="18"></minInclusive>

<maxInclusive value="110"></maxInclusive>

</restriction>

</simpleType>

</element>

<element name="exam-form" type="string"></element>

</sequence>

<attribute name="id" type="string" use="required"></attribute>

</complexType>

</element>

</sequence>

</complexType>

</element>

</schema>