# Neo4J 4.0 Upgrade failing

**URL:** <https://community.neo4j.com/t/neo4j-4-0-upgrade-failing/14344>\
**Category:** Desktop\
**Created:** [February 4, 2020, 5:21pm UTC](https://community.neo4j.com/t/neo4j-4-0-upgrade-failing/14344 "2020-02-04T17:21:30Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![tony.chiboucas](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/tony.chiboucas/32/5980_2.png) [@tony.chiboucas](https://community.neo4j.com/u/tony.chiboucas)\
**Post date:** [February 4, 2020, 6:52pm UTC](https://community.neo4j.com/t/neo4j-4-0-upgrade-failing/14344/6 "2020-02-04T18:52:26Z")

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Hello @tideon,

Several other users have encountered similar issues in the upgrade, with solutions discussed here:

> [@Neo4j 4.0 Upgrade Discussion (Desktop)](https://community.neo4j.com/t/neo4j-4-0-upgrade-discussion-desktop/13858/5):
>
> from log: 2018-09-06 08:36:37.840+0000 ERROR Unexpected error detected in bolt session '005056fffec00001-00002224-0000021c-2e27a82a800fad4d-8411f5be'. The client is unauthorized due to authentication failure. org.neo4j.bolt.v1.runtime.BoltConnectionFatality: The client is unauthorized due to authentication failure. at org.neo4j.bolt.v1.runtime.BoltStateMachine.handleFailure(BoltStateMachine.java:742) at org.neo4j.bolt.v1.runtime.BoltStateMachine.handleFailure(BoltStateMachine.java:728) at or…

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_[View the full topic](https://community.neo4j.com/t/neo4j-4-0-upgrade-failing/14344)._