Hi all. Is it possible to migrate from 0.11.5 to 0.13.3? I get the following error, so I assume it’s not possible?

graphql_1   |                                                                                  
graphql_1   | Running Alembic migrations...                                                    
graphql_1   | INFO  [alembic.runtime.migration] Context impl PostgresqlImpl.
graphql_1   | INFO  [alembic.runtime.migration] Will assume transactional DDL.
graphql_1   |                                                                                  
graphql_1   | Could not upgrade the database!
graphql_1   | Error: Can't locate revision identified by '7e65dadba625'

Hi @Howard Cornwell - upgrading Server between those two versions isn’t possible but the rest of Core should work just fine. The reason is that 0.13.0 introduced a complete overhaul of Server with a host of new features and a shared code base with Prefect Cloud. My recommendation would be to create a new Server instance on 0.13.3 and re-register your flows there.

Thanks for the response, appreciated 🙂

Hi @Howard Cornwell I received the same error as nicholas. How do I create a new Server instance on 0.13.3?

Hi @Luke - you'll need to upgrade your version of Prefect (

pip install prefect --upgrade

) and re-run

prefect server start

thanks, nicholas. hmm...I have 0.13.3 installed but am still getting that error after re-running

prefect server start

It seems you're trying to run the new Server instance on an existing Server database - since the old DB is incompatible with the new, you'll need to remove any persistent volumes to make that happen.

that worked. Thank you!