Hi. When i install latest prefect in 3.9 python environment after command "prefect server start" , it download images with tags core_0.15.7. but inside this images python environment is not 3.9. so for 3.9 version should i download specific images ?

Hi! I don't think we publish server images across multiple Python versions

I dont know. i have prefect on python 3.8 but dask cluster has python 3.9 environment and it is not clear how it will work

The Python version should match on your registration / execution environments but does not need to match on the Server. For example, you register your flow locally on 3.9, it's stored in the Server which is hosting an API using 3.8, you create a flow run and it's submitted to a local agent running 3.9 and it creates a subprocess to execute the flow. Your tasks are submitted to dask workers, which should also be running 3.9.

I got it. Thanks