# Logger error after migrating from 2.1.7 to 2.2.2

**URL:** <https://community.gatling.io/t/logger-error-after-migrating-from-2-1-7-to-2-2-2/3184>\
**Category:** Gatling (Open-Source)\
**Created:** [August 10, 2016, 7:06am UTC](https://community.gatling.io/t/logger-error-after-migrating-from-2-1-7-to-2-2-2/3184 "2016-08-10T07:06:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![slandelle](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/slandelle/32/4_2.png) [@slandelle](https://community.gatling.io/u/slandelle)\
**Post date:** [August 10, 2016, 7:06am UTC](https://community.gatling.io/t/logger-error-after-migrating-from-2-1-7-to-2-2-2/3184/1 "2016-08-10T07:06:37Z")

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You’re probably forcing dependencies versions, or ship another library whose dependencies versions conflict with ours.  
All in all, it seems you’re shipping Akka 2.3 while Gatling 2.2 depends on Akka 2.4.