... anchor "..." already defined

Cause:

An anchor with the same name is already defined. Each anchor should be unique.

Example:

<form> anchor "my_form" already defined

Good<form name="my_form" action="test1.jsp"></form>

<form name="my_form" action="test2.jsp"></form>

Good<form name="my_form1" action="test1.jsp"></form>

<form name="my_form2" action="test2.jsp"></form>

Solution:

Choose another name for the anchor or modify the previous one.

References: