Extra namespace attrubutes are added when writing with xmlfile

When generating an XML file using streamed xmlfile, it adds extra namespace declarations:

<root xmlns:g="http://base.google.com/ns/1.0" version="2.0">
    <items>
        <item>
            <g:id xmlns:g="http://base.google.com/ns/1.0">1</g:id>
        </item>
        <item>
            <g:id xmlns:g="http://base.google.com/ns/1.0">2</g:id>
        </item>
        <item>
            <g:id xmlns:g="http://base.google.com/ns/1.0">3</g:id>
        </item>
        <item>
            <g:id xmlns:g="http://base.google.com/ns/1.0">4</g:id>
        </item>
        <item>
            <g:id xmlns:g="http://base.google.com/ns/1.0">5</g:id>
        </item>
    </items>
</root>

I expect xmlfile to just add element prefix, without repeating the "xmlns:g" attribute for each element, as namespace is already defined in the "root" element.

Expected output:

<root xmlns:g="http://base.google.com/ns/1.0" version="2.0">
    <items>
        <item>
            <g:id>1</g:id>
        </item>
        <item>
            <g:id>2</g:id>
        </item>
        <item>
            <g:id>3</g:id>
        </item>
        <item>
            <g:id>4</g:id>
        </item>
        <item>
            <g:id>5</g:id>
        </item>
    </items>
</root>

I attached a file with the sample script.

Python : sys.version_info(major=3, minor=11, micro=4, releaselevel='final', serial=0)
lxml.etree : (4, 9, 3, 0)
libxml used : (2, 10, 3)
libxml compiled : (2, 10, 3)
libxslt used : (1, 1, 38)
libxslt compiled : (1, 1, 38)