Hello Prefect Community I ve done an upgrade to my prefect s

Question

Hello Prefect Community I ve done an upgrade to my prefect server and when I am trying to start the server I am having an alembic issue Prefect is installed over linux and the db is in a docker postgres I ve installed the latest version of prefect 2 10 21 the issue when i start the server ```alembic util exc CommandError Multiple head revisions are present for given argument head please specify a specific target revision lt branchname gt head to narrow to a specific head or heads for all heads```

Bianca Hoch · Answer

Hi Inigo This looks like an alembic issue What version did you upgrade from

iñigo · Answer

from 2 8 3

Bianca Hoch · Answer

Gotcha Is that the full stack trace of the error

iñigo · Answer

no that s the last part of the error

Bianca Hoch · Answer

Would you mind sharing the rest Curious to see if there s any other info that may help with troubleshooting

iñigo · Answer

in fact I m not able to retreive it because I have restarted all as I could not wait It wasn t so hard to restart all as I have for every object deployment secret string in python scripts

Bianca Hoch · Answer

When you say you ve restarted is it that you ve done a fresh instillation and setup a new db

Bianca Hoch · Answer

Did the problem resolve itself

iñigo · Answer

yes I ve recreated the postgres volume and docker

iñigo · Answer

but I had to remove a py file inside of prefect migrations or something like that

iñigo · Answer

local lib python3 9 site packages prefect server database migrations versions postgresql 2023 02 27 094322 b34d8de0721a py I had to remove this file

Bianca Hoch · Answer

Interesting Thanks for sharing the details here It ll be helpful in case someone else runs into a similar issue

iñigo · Answer

yes in fact after that I think that could have solved the problem

iñigo · Answer

As I tried to update the DB and I couldn t