Hello,
I'm looking to upgrade from version 3.4 to version 23.10.
To do this, I've created a new 23.10 server, and now I'm doing the migration (following the documentation).
However, as soon as the data is transferred, I can no longer access the 23.10 server
![](https://uploads-eu-west-1.insided.com/centreon-en/attachment/3f5a87fc-cd15-4c61-95bc-991aca5f5830.png)
Do you have any idea how I can solve this problem?
Thank you for your answer, have a nice day,
Best answer by vcoum
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