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    <title>MongoDB Jira</title>
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    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-12968] Incorrect FAQ in sharding section - shard keys can be changed in 4.2</title>
                <link>https://jira.mongodb.org/browse/DOCS-12968</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;
&lt;p&gt;Hi All,&lt;/p&gt;

&lt;p&gt;It looks like the FAQ sharding section &lt;a href=&quot;https://docs.mongodb.com/manual/faq/sharding/#can-i-change-the-shard-key-after-sharding-a-collection&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&quot;Can I change the shard key after sharding a collection&quot;&lt;/a&gt; needs to be updated with the release of 4.2 per &lt;a href=&quot;https://docs.mongodb.com/manual/core/sharding-shard-key/#update-shard-key&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&quot;Change a Document&#8217;s Shard Key Value&quot;&lt;/a&gt;, specifically noting:&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;Starting in MongoDB 4.2, you can update a document&#8217;s shard key value unless the shard key field is the immutable _id field.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;You could start the text with something like:&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;No, when you are using MongoDB 4.0 or earlier. Yes, if you are using MongoDB 4.2 and the shard key is not the immutable &lt;tt&gt;_id&lt;/tt&gt; field.&lt;/p&gt;&lt;/blockquote&gt;


&lt;p&gt;Thanks!&lt;br/&gt;
Eoin&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
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                <environment></environment>
        <key id="900899">DOCS-12968</key>
            <summary>Incorrect FAQ in sharding section - shard keys can be changed in 4.2</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="eoin.brazil@mongodb.com">Eoin Brazil</reporter>
                        <labels>
                    </labels>
                <created>Tue, 20 Aug 2019 09:09:14 +0000</created>
                <updated>Mon, 30 Oct 2023 20:36:07 +0000</updated>
                            <resolved>Tue, 20 Aug 2019 13:21:55 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2378721" author="xgen-internal-githook" created="Tue, 20 Aug 2019 12:49:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-12968&quot; title=&quot;Incorrect FAQ in sharding section - shard keys can be changed in 4.2&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-12968&quot;&gt;&lt;del&gt;DOCS-12968&lt;/del&gt;&lt;/a&gt;: tweak wording on faq shard key&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/abc5dd4b83936a794b438a077dcf214ba6f6aeef&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/abc5dd4b83936a794b438a077dcf214ba6f6aeef&lt;/a&gt;&lt;/p&gt;</comment>
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