​Can you try following command see if that helps,
../web$ FLASK_APP=pgAdmin4.py flask db merge heads​

Given command will try to merge two conflicting heads together
automatically.
For more information refer alembic documentation:
http://alembic.zzzcomputing.com/en/latest/branches.html

-- Murtuza

On Fri, Nov 3, 2017 at 3:40 PM, Willy-Bas Loos <willy...@gmail.com> wrote:

> thanks for the answer.
> flask won't give me a history, i get the same error (multiple head
> revisions).
> I've looked into the flask manual, and tried some things that the message
> suggests, like FLASK_APP=pgAdmin4.py flask db revision --head master@head
> But that doesn't help, still the same error.
> I don't mind doing a hard reset or anything. Is there a trick to get this
> back on track?
>
> Cheers,
> Willy-Bas
>
> On Thu, Nov 2, 2017 at 12:07 PM, Murtuza Zabuawala <murtuza.zabuawala@
> enterprisedb.com> wrote:
>
>> I suspect you have some local revisions, Could you run below command and
>> see if you have any local revisions?
>>
>> ../web$ FLASK_APP=pgAdmin4.py flask db history
>>
>> You can compare it with what we(pgadmin4) have in revision history,
>> ...
>> ...
>> d85a62333272 -> ef590e979b0d (head), empty message
>> f195f9a4923d -> d85a62333272, empty message
>> 3c1e4b6eda55 -> f195f9a4923d, Encrypt the existing user password.
>> 09d53fca90c7 -> 3c1e4b6eda55, empty message
>> fdc58d9bd449 -> 09d53fca90c7, Update DB to version 14
>> <base> -> fdc58d9bd449, Initial database creation
>>
>>
>> --
>> Regards,
>> Murtuza Zabuawala
>> EnterpriseDB: http://www.enterprisedb.com
>> The Enterprise PostgreSQL Company
>>
>>
>> On Thu, Nov 2, 2017 at 3:37 PM, Willy-Bas Loos <willy...@gmail.com>
>> wrote:
>>
>>> Just to clarify, this is not a git question
>>>
>>> Op 1 nov. 2017 12:19 p.m. schreef "Willy-Bas Loos" <willy...@gmail.com>:
>>>
>>>> Hi,
>>>>
>>>> After my stash & pull to upgrade from 2.0rc1 to 2.0, these commands
>>>> both end in the error below.
>>>>
>>>>    - ../web$ FLASK_APP=pgAdmin4.py flask db revision
>>>>    - ../web$ python pgAdmin4.py
>>>>
>>>>
>>>> File "/home/wbloos/.virtualenvs/pgadmin4/lib/python3.5/site-packa
>>>> ges/alembic/script/revision.py", line 270, in get_current_head
>>>>     "%s@head" % branch_label if branch_label else "head")
>>>> alembic.util.exc.CommandError: Multiple head revisions are present for
>>>> given argument 'head'; please specify a specific target revision,
>>>> '<branchname>@head' to narrow to a specific head, or 'heads' for all heads
>>>>
>>>> I use Version: webpack 3.6.0
>>>>
>>>> Any tips?
>>>>
>>>> Cheers,
>>>> --
>>>> Willy-Bas Loos
>>>>
>>>
>>
>
>
> --
> Willy-Bas Loos
>

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