# Neo4j backup fails after upgrading from 4.0.x to 4.3.x

**URL:** <https://community.neo4j.com/t/neo4j-backup-fails-after-upgrading-from-4-0-x-to-4-3-x/44347>\
**Category:** Import / Export\
**Tags:** operations\
**Created:** [September 13, 2021, 5:35pm UTC](https://community.neo4j.com/t/neo4j-backup-fails-after-upgrading-from-4-0-x-to-4-3-x/44347 "2021-09-13T17:35:15Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rprocket](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/rprocket/32/20043_2.png) [@rprocket](https://community.neo4j.com/u/rprocket)\
**Post date:** [September 13, 2021, 5:35pm UTC](https://community.neo4j.com/t/neo4j-backup-fails-after-upgrading-from-4-0-x-to-4-3-x/44347/1 "2021-09-13T17:35:15Z")

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Hi there, I have upgraded neo4j 4.0.11 to 4.3.2 recently. I was able to restore all the user databases on the new version and can query the db's just fine. I have performed consistency check on all the db's restored on the new instance and they all passed. I wanted to make sure i can successfully capture the backup before i call the upgrade successful but the backup is failing with the below error. could some one please help! much appreciated.

- neo4j version 4.3.2

```auto
2021-09-13 16:44:58.377+0000 INFO [c.n.c.c.SimpleInboundCatchupProtocolMessageLogger] [backup-server] Handling TxPullRequest for DatabaseId{4c27db6e}. Requires to pull transactions above transaction id: 71 [From: /127.0.0.1:57046]
2021-09-13 16:44:58.380+0000 WARN [c.n.c.c.t.TxPullRequestHandler] [solution/4c27db6e] Failed streaming transactions [72--72] to /127.0.0.1:57046
java.io.IOException: Unsupported in this version: LogCommandSerializationV4_0

```

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<div class="post-metadata">

**Author:** ![rprocket](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/rprocket/32/20043_2.png) [@rprocket](https://community.neo4j.com/u/rprocket)\
**Post date:** [September 15, 2021, 2:48pm UTC](https://community.neo4j.com/t/neo4j-backup-fails-after-upgrading-from-4-0-x-to-4-3-x/44347/2 "2021-09-15T14:48:01Z")

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this is resolved now. had to drop and recreate all the indexes and constraints.

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<div class="post-metadata">

**Author:** ![ameyasoft](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/ameyasoft/32/32639_2.png) [@ameyasoft](https://community.neo4j.com/u/ameyasoft)\
**Post date:** [September 15, 2021, 4:15pm UTC](https://community.neo4j.com/t/neo4j-backup-fails-after-upgrading-from-4-0-x-to-4-3-x/44347/3 "2021-09-15T16:15:19Z")

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I am also working on similar migration.Please share the steps you followed in your upgrade from 4.0.x ti 4.3.x. Thanks