diff --git a/app.py b/app.py
index eb33b28..04429a8 100755
--- a/app.py
+++ b/app.py
@@ -48,12 +48,12 @@ class ModelForm(BaseModelForm):
 class User(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     username = db.Column(db.String, unique=True, nullable=False)
-    email = db.Column(db.String, unique=True, nullable=False)
-    name = db.Column(db.String, unique=True, nullable=False)
+    email = db.Column(db.String, nullable=False)
+    name = db.Column(db.String, nullable=False)
     password = db.Column(db.String, nullable=False)
 
-    institution = db.Column(db.String, unique=True, nullable=False)
-    position = db.Column(db.String, unique=True, nullable=False)
+    institution = db.Column(db.String, nullable=False)
+    position = db.Column(db.String, nullable=False)
 
     admin = db.Column(db.Boolean)
 
diff --git a/migrations/versions/6249fce1ead9_.py b/migrations/versions/6249fce1ead9_.py
new file mode 100644
index 0000000..29f28fd
--- /dev/null
+++ b/migrations/versions/6249fce1ead9_.py
@@ -0,0 +1,34 @@
+"""empty message
+
+Revision ID: 6249fce1ead9
+Revises: 282564545160
+Create Date: 2023-05-22 11:28:00.309973
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '6249fce1ead9'
+down_revision = '282564545160'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('chemical', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('person_id', sa.Integer(), nullable=False))
+        batch_op.drop_column('person_name')
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('chemical', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('person_name', sa.VARCHAR(), nullable=False))
+        batch_op.drop_column('person_id')
+
+    # ### end Alembic commands ###