Hi, try this sample.
<?xml version="1.0"?>
<articles xmlns="http://pkp.sfu.ca" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<article xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" date_submitted="2020-05-09" status="3" submission_progress="0" current_publication_id="1040" stage="submission">
<id type="internal" advice="ignore">606</id>
<submission_file xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" stage="production_ready" id="893" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<revision number="1" genre="general" filename="origname" viewable="false" date_uploaded="2020-05-09" date_modified="2020-05-09" filesize="534182" filetype="application/pdf" uploader="admin">
<name locale="en_US">admin, origname.pdf</name>
<embed encoding="base64">base64</embed>
</revision>
</submission_file>
<publication xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" locale="ru_RU" version="1" status="3" primary_contact_id="1279" url_path="" seq="15" date_published="2020-05-09" section_ref="ст" access_status="0" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<id type="internal" advice="ignore">1040</id>
<title locale="en_US">My Test Title Example</title>
<title locale="ru_RU">My Test Title Example</title>
<abstract locale="en_US">Abstract.</abstract>
<abstract locale="ru_RU">Аннотация</abstract>
<keywords locale="ru_RU">
<keyword>ключевое слово1</keyword>
<keyword>ключевое слово2</keyword>
</keywords>
<keywords locale="en_US">
<keyword>keyword1</keyword>
<keyword>keyword2</keyword>
</keywords>
<subjects locale="ru_RU">
<subject>УДК 004.62</subject>
</subjects>
<subjects locale="en_US">
<subject>UDC 004.62</subject>
</subjects>
<authors xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<author include_in_browse="true" user_group_ref="author" seq="1" id="1281">
<givenname locale="en_US">John</givenname>
<givenname locale="ru_RU">Джон</givenname>
<familyname locale="en_US">Doe</familyname>
<familyname locale="ru_RU">Дое</familyname>
<affiliation locale="ru_RU">Affiliation1; Affiliation2</affiliation>
<affiliation locale="en_US">Affiliation1; Affiliation2</affiliation>
<country>RU</country>
<email>john.doe@example.com</email>
<biography locale="en_US">Bio eng</biography>
<biography locale="ru_RU">Bio rus</biography>
</author>
</authors>
<article_galley xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" locale="ru_RU" approved="false" xsi:schemaLocation="http://pkp.sfu.ca native.xsd">
<id type="internal" advice="ignore">701</id>
<name locale="ru_RU">PDF</name>
<seq>0</seq>
<submission_file_ref id="893" revision="1"/>
</article_galley>
<issue_identification>
<volume>23</volume>
<number>3</number>
<year>2020</year>
</issue_identification>
<pages>433-450</pages>
<citations>
<citation>Doe J. Test citation title // My journal(MJ). 2020. V. 123. Issue 321. Article No 20.</citation>
</citations>
</publication>
</article>
</articles>
If you don’t have some IDs yet, you can simply delete them or set them to zero if necessary, such as the author ID.