diff --git a/anitya/db/migrations/versions/ebc827e80373_remove_unique_attribute_from_username.py b/anitya/db/migrations/versions/ebc827e80373_remove_unique_attribute_from_username.py
index ae78b777..6a4a3291 100644
--- a/anitya/db/migrations/versions/ebc827e80373_remove_unique_attribute_from_username.py
+++ b/anitya/db/migrations/versions/ebc827e80373_remove_unique_attribute_from_username.py
@@ -15,12 +15,16 @@
 def upgrade():
     """Alembic migration."""
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_constraint("ix_users_username", "users", type_="unique")
+    # Remove the index and recreate it as there is no way to remove just the unique
+    # constrain from index
+    op.drop_index("ix_users_username", "users")
+    op.create_index("ix_users_username", "users", ["username"])
     # ### end Alembic commands ###
 
 
 def downgrade():
     """Downgrade migration."""
     # ### commands auto generated by Alembic - please adjust! ###
-    op.create_unique_constraint("ix_users_username", "users", ["username"])
+    op.drop_index("ix_users_username", "users")
+    op.create_index(op.f("ix_users_username"), "users", ["username"], unique=True)
     # ### end Alembic commands ###