diff --git a/backend/migrations/versions/24b8e319c0d0_new_table_for_bought_entries_with_.py b/backend/migrations/versions/24b8e319c0d0_new_table_for_bought_entries_with_.py
deleted file mode 100644
index 84c50d2..0000000
--- a/backend/migrations/versions/24b8e319c0d0_new_table_for_bought_entries_with_.py
+++ /dev/null
@@ -1,40 +0,0 @@
-"""new table for bought entries with unknown items
-
-Revision ID: 24b8e319c0d0
-Revises: 015f4256bb4c
-Create Date: 2024-06-02 13:14:38.681605
-
-"""
-from alembic import op
-import sqlalchemy as sa
-
-
-# revision identifiers, used by Alembic.
-revision = '24b8e319c0d0'
-down_revision = '015f4256bb4c'
-branch_labels = None
-depends_on = None
-
-
-def upgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
-    with op.batch_alter_table('payment', schema=None) as batch_op:
-        batch_op.alter_column('token',
-               existing_type=sa.VARCHAR(length=15),
-               nullable=True)
-        batch_op.drop_constraint('payment_token_fkey', type_='foreignkey')
-        batch_op.create_foreign_key(None, 'login_token', ['token'], ['token'])
-
-    # ### end Alembic commands ###
-
-
-def downgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
-    with op.batch_alter_table('payment', schema=None) as batch_op:
-        batch_op.drop_constraint(None, type_='foreignkey')
-        batch_op.create_foreign_key('payment_token_fkey', 'login_token', ['token'], ['token'], onupdate='CASCADE', ondelete='CASCADE')
-        batch_op.alter_column('token',
-               existing_type=sa.VARCHAR(length=15),
-               nullable=False)
-
-    # ### end Alembic commands ###
diff --git a/backend/migrations/versions/2a64d3b9235a_new_table_for_bought_entries_with_.py b/backend/migrations/versions/2a64d3b9235a_new_table_for_bought_entries_with_.py
index 9290cfe..5be7818 100644
--- a/backend/migrations/versions/2a64d3b9235a_new_table_for_bought_entries_with_.py
+++ b/backend/migrations/versions/2a64d3b9235a_new_table_for_bought_entries_with_.py
@@ -1,7 +1,7 @@
 """new table for bought entries with unknown items 2
 
 Revision ID: 2a64d3b9235a
-Revises: 24b8e319c0d0
+Revises: 015f4256bb4c
 Create Date: 2024-06-02 13:19:59.901053
 
 """
@@ -11,7 +11,7 @@ import sqlalchemy as sa
 
 # revision identifiers, used by Alembic.
 revision = '2a64d3b9235a'
-down_revision = '24b8e319c0d0'
+down_revision = '015f4256bb4c'
 branch_labels = None
 depends_on = None
 
diff --git a/backend/models/payment.py b/backend/models/payment.py
index f2f64c2..d9f7b06 100644
--- a/backend/models/payment.py
+++ b/backend/models/payment.py
@@ -4,7 +4,7 @@ from src import db
 class Payment(db.Model):
     id = db.Column(db.BigInteger, primary_key=True, autoincrement=True)
     token = db.Column(db.ForeignKey('login_token.token'),
-                      server_onupdate=db.FetchedValue())
+                      server_onupdate=db.FetchedValue(), nullable=False)
     date = db.Column(db.Date, nullable=False, server_default=db.func.now())
     amount = db.Column(db.BigInteger, nullable=False, server_default=str(0))