# SW5.2.1 Upgradation Failed

**URL:** <https://forum.shopware.com/t/sw5-2-1-upgradation-failed/37942>\
**Category:** Installation/Einstieg\
**Created:** [5. Juli 2016 um 15:57 UTC](https://forum.shopware.com/t/sw5-2-1-upgradation-failed/37942 "2016-07-05T15:57:53Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![testusernetwork1](https://avatars.discourse-cdn.com/v4/letter/t/e5b9ba/32.png) [@testusernetwork1](https://forum.shopware.com/u/testusernetwork1)\
**Post date:** [5. Juli 2016 um 15:57 UTC](https://forum.shopware.com/t/sw5-2-1-upgradation-failed/37942/1 "2016-07-05T15:57:53Z")

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Hai,

I am in process of upgrading my Shopware to&nbsp;5.2.1.

I have completed Data Migration. After CleanUp i got the below error…

**Fatal error** : Declaration of Shopware\Components\DependencyInjection\Container::reset() must be compatible with Symfony\Component\DependencyInjection\ResettableContainerInterface::reset() in&nbsp; **engine/Shopware/Components/DependencyInjection/Container.php** &nbsp;on line&nbsp; **35**

Could anybody help me to solve this issue.

Thanks in Advance.  
&nbsp;

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**Author:** ![sharky2207](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@sharky2207](https://forum.shopware.com/u/sharky2207)\
**Post date:** [7. Juli 2016 um 22:45 UTC](https://forum.shopware.com/t/sw5-2-1-upgradation-failed/37942/2 "2016-07-07T22:45:47Z")

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same here… does&nbsp;anybody have an idea how to fix this?!

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**Author:** ![NextMike](https://avatars.discourse-cdn.com/v4/letter/n/838e76/32.png) [@NextMike](https://forum.shopware.com/u/NextMike)\
**Post date:** [8. Juli 2016 um 10:05 UTC](https://forum.shopware.com/t/sw5-2-1-upgradation-failed/37942/3 "2016-07-08T10:05:44Z")

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I wouldn’t update yet, there are currently too many problems. See the forum. For example I&nbsp;have to refactor my theme. I hope you are testing the update.

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**Author:** ![sharky2207](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@sharky2207](https://forum.shopware.com/u/sharky2207)\
**Post date:** [8. Juli 2016 um 13:11 UTC](https://forum.shopware.com/t/sw5-2-1-upgradation-failed/37942/4 "2016-07-08T13:11:57Z")

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Hi, thanks for your request. But at the end you fixed it?

Best regards

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**Author:** ![NextMike](https://avatars.discourse-cdn.com/v4/letter/n/838e76/32.png) [@NextMike](https://forum.shopware.com/u/NextMike)\
**Post date:** [8. Juli 2016 um 13:13 UTC](https://forum.shopware.com/t/sw5-2-1-upgradation-failed/37942/5 "2016-07-08T13:13:14Z")

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I have to do that, before updating.