blocks|key|5358269|text|我使用了类似的方法，并删除了：HKEY_CURRENT_USER\SOFTWARE\Microsoft\Microsoft+SQL+Server\UserInstances中没有正确ParentInstance键的所有键，比如MSSQL13E.LOCALDB。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5358270|无需重新安装或重新启动。|5358271|entityMap^0|F|1Z|2J|E|35|G|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|R|8|@]|D|@]|E|$]]]|I|$]]

I had something similar and deleted any keys in:
<code>HKEY_CURRENT_USER\SOFTWARE\Microsoft\Microsoft SQL Server\UserInstances</code>
that did not have the correct <code>ParentInstance</code> key such as <code>MSSQL13E.LOCALDB</code>.

No need to reinstall or reboot.

blocks|key|331747|text|这发生在我的LocalDB更新时(可能是由Visual+Studio安装程序更新的)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|331748|我已经在PowerShell控制台中使用以下步骤重新创建了实例：|331749|λ+SqlLocalDB+delete+MSSQLLocalDB
LocalDB+instance+"MSSQLLocalDB"+deleted.

λ+SqlLocalDB+create+MSSQLLocalDB
LocalDB+instance+"MSSQLLocalDB"+created+with+version+13.1.4001.0.

λ+SqlLocalDB+start+MSSQLLocalDB
LocalDB+instance+"MSSQLLocalDB"+started.|code-block|syntax|javascript|331750|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

It happened to me when my LocalDB got updated (probably by Visual Studio installer) 
I've recreated the instance using the following steps in PowerShell console:
<pre><code>λ SqlLocalDB delete MSSQLLocalDB
LocalDB instance &quot;MSSQLLocalDB&quot; deleted.

λ SqlLocalDB create MSSQLLocalDB
LocalDB instance &quot;MSSQLLocalDB&quot; created with version 13.1.4001.0.

λ SqlLocalDB start MSSQLLocalDB
LocalDB instance &quot;MSSQLLocalDB&quot; started.
</code></pre>

blocks|key|331742|text|我在从SQL+LocalDb+2016迁移到2017的过程中也遇到了同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|331743|我只需将ParentInstance密钥的值从MSSQL13E.LOCALDB更改为MSSQL14E.LOCALDB，它就起作用了！|offset|length|style|CODE|331744|Ty为我指出了关键的HKEY_CURRENT_USER\SOFTWARE\Microsoft\Microsoft+SQL+Server\UserInstances|331745|entityMap^0|0|4|E|N|G|16|G|0|A|1Z|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]|$D|P|E|Q|F|G]|$D|R|E|S|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|K|$]]

I had the same problem for migrating from SQL LocalDb 2016 to 2017.

I simply changed the value of the <code>ParentInstance</code> key from <code>MSSQL13E.LOCALDB</code> 
 to <code>MSSQL14E.LOCALDB</code> and it worked !

Ty for pointing me to the key <code>HKEY_CURRENT_USER\SOFTWARE\Microsoft\Microsoft SQL Server\UserInstances</code>

blocks|key|2243407|text|我需要将Microsoft+SQL+Server+LocalDB+2016+Express的安装更改为2014，因此我卸载了2016，然后安装了2014。在此之后，当我尝试附加数据库时，我得到了以下错误：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2243408|2243409|+LocalDB父实例版本无效:+MSSQL13E.LOCALDB|blockquote|2243410|2243411|2243412|为了解决这个问题，我从我的计算机上卸载了所有提到的Microsoft+SQL+Server+2016，然后从以下注册表位置删除了相关的实例GUID，重新启动并安装了2014年的LocalDB，一切正常：|2243413|HKEY_USERS\.DEFAULT\Software\Microsoft\Microsoft+SQL+Server\UserInstances\|code-block|syntax|javascript|2243414|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|S|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|W|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|P|$]]

I needed to change my install of Microsoft SQL Server LocalDB 2016 Express to 2014, so I uninstalled 2016 then installed 2014. After this I got the following error when ever I tried to attach a database:

<blockquote>
 LocalDB parent instance version is invalid: MSSQL13E.LOCALDB
</blockquote>

To resolve the issue I uninstalled all mention of Microsoft SQL Server 2016 from my computer then deleted the related instance GUIDs from the following registry location, rebooted, installed 2014 LocalDB and all was good:

<pre><code>HKEY_USERS\.DEFAULT\Software\Microsoft\Microsoft SQL Server\UserInstances\
</code></pre>

blocks|key|3246859|text|请记住更新寄存器：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3246860|HKEY_USERS\.DEFAULT\Software\Microsoft\Microsoft+SQL+Server\UserInstances|code-block|syntax|javascript|3246861|检查|3246862|我必须这样做，因为它是错误的，需要它在Windows+Server+2012中工作。|3246863|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Remember update the Register:
<pre><code>HKEY_USERS\.DEFAULT\Software\Microsoft\Microsoft SQL Server\UserInstances
</code></pre>
Check <a href="https://i.stack.imgur.com/A1h2o.png" rel="nofollow noreferrer">.DEFAULT</a>
I have to do that, because it was wrong and need it to work in Windows Server 2012.

I'm unable to add a database on a developer machine.
I'm running win 10, visual studio 2015.
I re-installed SQL server 2016 twice, last time with firewall disabled it all gave green marks in the end.

While i can create databases in VS2015 SQL server object explorer.
I am unable to add a SQL database(S) to my projects, trough solution explorer.

Each time i try to add a database to a project i get event
 527 SQLLocalDB 12.0 
LocalDB parent instance version is invalid: MSSQL13E.LOCALDB

I've tried
Start > Run > cmd > sqlcmd -L
and it shows my SQLserver

Also made sure it uses the right ports as by (<a href="https://stackoverflow.com/questions/18060667/why-am-i-getting-cannot-connect-to-server-a-network-related-or-instance-speci">Why am I getting &quot;Cannot Connect to Server - A network-related or instance-specific error&quot;?</a>)

i think that SQL is installed properly but that something is not allowing me to add databases (maybe because some root database?? is missing or so i am not sure i m not an export on SQL, but as the error says some DB seams missing ??

LocalDB parent instance version invalid: MSSQL13E.LOCALDB

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我无法在开发人员计算机上添加数据库。我正在运行win 10，visual studio 2015。我重新安装了SQL server 2016两次，最后一次禁用了防火墙，最后都是绿色标记。而我可以在VS2015 SQL server对象资源管理器中创建数据库。我无法通过解决方案资源管理器将SQL数据库添加到我的项目中。每次尝试将数据库添加到项目中时，都会收到事件527 SQLLocalDB 12.0

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