Can't update enum column from the flask-admin edit form

[ClementDelannoySlateDigital]

Hello, thank you in advance for your help

The error message:
Failed to update record. (psycopg2.errors.InvalidTextRepresentation) invalid input value for enum enumname: "enumvalue" LINE 1:

My model:

class EnumName(enum.Enum):
enumvalue1 = 1
enumvalue2 = 2

EnumName.enumvalue1.label = "enumvalue1"
EnumName.enumvalue2.label = "enumvalue2"

I have nothing weird in my ModelView, I just want to display my column and make that enum editable.
In the edit panel, I have a dropdown displaying the values. I can modify them.
But when I click on the Save button, this error appears:

Failed to update record. (psycopg2.errors.InvalidTextRepresentation) invalid input value for enum enumname: "enumvalue" LINE 1:

In the callstack serverside, there is also a mention to sqlalchemy.exc.DataError

I guess it tries to update with a string instead of an enumvalue. But I don't get the internal with psycopg2.

I'm sorry if this ticket has already been discussed, but I can't find any information other than weird unsustainable workaround, and I'd like to avoid this kind of stuff 😄

Environment:

• Python version: 3.12.8
• Flask version: 3.1.0
• Flask-Admin version: 1.6.1
• WTForms: 3.1.2 (I fixed that due to a bug with 3.2.0, that's why I put that here)

[ClementDelannoySlateDigital]

Oh, and this column was created using alembic.op on a postgresql database:

    with op.batch_alter_table('tablename', schema=None) as batch_op:
        batch_op.add_column(sa.Column('columnname', sa.Enum('enumvalue1', 'enumvalue2', name='enumname', nullable=False, server_default='enumvalue1'))