diff --git a/staffeln/db/sqlalchemy/alembic/versions/041d9a0f1159_backup_add_names.py b/staffeln/db/sqlalchemy/alembic/versions/041d9a0f1159_backup_add_names.py
index c6869b2..2c68343 100644
--- a/staffeln/db/sqlalchemy/alembic/versions/041d9a0f1159_backup_add_names.py
+++ b/staffeln/db/sqlalchemy/alembic/versions/041d9a0f1159_backup_add_names.py
@@ -21,8 +21,8 @@
 revision = "041d9a0f1159"
 down_revision = ""
 
-import sqlalchemy as sa  # noqa: E402
 from alembic import op  # noqa: E402
+import sqlalchemy as sa  # noqa: E402
 
 
 def upgrade():
diff --git a/staffeln/db/sqlalchemy/alembic/versions/ebdbed01e9a7_added_incremental_field.py b/staffeln/db/sqlalchemy/alembic/versions/ebdbed01e9a7_added_incremental_field.py
index e57cd2c..a2f08ff 100644
--- a/staffeln/db/sqlalchemy/alembic/versions/ebdbed01e9a7_added_incremental_field.py
+++ b/staffeln/db/sqlalchemy/alembic/versions/ebdbed01e9a7_added_incremental_field.py
@@ -7,15 +7,15 @@
 """
 
 # revision identifiers, used by Alembic.
-revision = 'ebdbed01e9a7'
-down_revision = '041d9a0f1159'
+revision = "ebdbed01e9a7"
+down_revision = "041d9a0f1159"
 
-from alembic import op
-import sqlalchemy as sa
+from alembic import op  # noqa: E402
+import sqlalchemy as sa  # noqa: E402
 
 
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.add_column('backup_data', sa.Column('incremental', sa.Boolean(), nullable=True))
-    op.add_column('queue_data', sa.Column('incremental', sa.Boolean(), nullable=True))
+    op.add_column("backup_data", sa.Column("incremental", sa.Boolean(), nullable=True))
+    op.add_column("queue_data", sa.Column("incremental", sa.Boolean(), nullable=True))
     # ### end Alembic commands ###
diff --git a/staffeln/db/sqlalchemy/models.py b/staffeln/db/sqlalchemy/models.py
index 0198ec2..d4f99ed 100644
--- a/staffeln/db/sqlalchemy/models.py
+++ b/staffeln/db/sqlalchemy/models.py
@@ -29,6 +29,7 @@
 
     def save(self, session=None):
         import staffeln.db.sqlalchemy.api as db_api
+
         if session is None:
             session = db_api.get_session()
 
diff --git a/staffeln/objects/queue.py b/staffeln/objects/queue.py
index 5c3c1f9..7982deb 100644
--- a/staffeln/objects/queue.py
+++ b/staffeln/objects/queue.py
@@ -1,4 +1,3 @@
-from email.policy import default
 from staffeln.db import api as db_api
 from staffeln.objects import base
 from staffeln.objects import fields as sfeild