diff --git a/api/migrations/versions/42e85ed5564d_conversation_columns_set_nullable.py b/api/migrations/versions/42e85ed5564d_conversation_columns_set_nullable.py
new file mode 100644
index 0000000000..f388b99b90
--- /dev/null
+++ b/api/migrations/versions/42e85ed5564d_conversation_columns_set_nullable.py
@@ -0,0 +1,48 @@
+"""conversation columns set nullable
+
+Revision ID: 42e85ed5564d
+Revises: f9107f83abab
+Create Date: 2024-03-07 08:30:29.133614
+
+"""
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '42e85ed5564d'
+down_revision = 'f9107f83abab'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('conversations', schema=None) as batch_op:
+        batch_op.alter_column('app_model_config_id',
+                              existing_type=postgresql.UUID(),
+                              nullable=True)
+        batch_op.alter_column('model_provider',
+                              existing_type=sa.VARCHAR(length=255),
+                              nullable=True)
+        batch_op.alter_column('model_id',
+                              existing_type=sa.VARCHAR(length=255),
+                              nullable=True)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('conversations', schema=None) as batch_op:
+        batch_op.alter_column('model_id',
+                              existing_type=sa.VARCHAR(length=255),
+                              nullable=False)
+        batch_op.alter_column('model_provider',
+                              existing_type=sa.VARCHAR(length=255),
+                              nullable=False)
+        batch_op.alter_column('app_model_config_id',
+                              existing_type=postgresql.UUID(),
+                              nullable=False)
+
+    # ### end Alembic commands ###
diff --git a/api/migrations/versions/b289e2408ee2_add_workflow.py b/api/migrations/versions/b289e2408ee2_add_workflow.py
index 5ae1e65611..cf8530dc67 100644
--- a/api/migrations/versions/b289e2408ee2_add_workflow.py
+++ b/api/migrations/versions/b289e2408ee2_add_workflow.py
@@ -78,8 +78,6 @@ def upgrade():
     sa.Column('error', sa.Text(), nullable=True),
     sa.Column('elapsed_time', sa.Float(), server_default=sa.text('0'), nullable=False),
     sa.Column('total_tokens', sa.Integer(), server_default=sa.text('0'), nullable=False),
-    sa.Column('total_price', sa.Numeric(precision=10, scale=7), nullable=True),
-    sa.Column('currency', sa.String(length=255), nullable=True),
     sa.Column('total_steps', sa.Integer(), server_default=sa.text('0'), nullable=True),
     sa.Column('created_by_role', sa.String(length=255), nullable=False),
     sa.Column('created_by', postgresql.UUID(), nullable=False),