5 Common Mistakes When Migrating to Supabase (And How to Avoid Them)

Migration Is the Hardest Part

Moving your backend to Supabase is one of the best decisions you can make for your app's long-term scalability. But it's also where most teams make costly mistakes. After handling dozens of migrations, here are the five errors we see most often — and how to avoid them.

Mistake #1: Migrating Without a Rollback Plan

The most dangerous mistake: cutting over to Supabase without any way to go back if something breaks.

How to avoid it: Never perform a hard cutover. Run both systems in parallel for 24–48 hours. Keep your old database live and read-only. Only decommission it after you've confirmed the new system works perfectly in production.

Mistake #2: Forgetting Foreign Key Relationships

A simple table export won't capture your foreign key constraints. When you import tables in the wrong order, you'll get constraint violation errors — or worse, silently broken relationships.

How to avoid it: Always export your full schema with pg_dump --schema-only first. Import tables in dependency order: referenced tables before referencing tables. Validate FK integrity after import with a SQL audit query.

Mistake #3: Ignoring Row Level Security (RLS)

Supabase enables RLS by default on new tables. If you don't configure policies, your API calls will return empty results — and it'll look like the migration failed even when the data is there.

How to avoid it: For every table, either write proper RLS policies or explicitly use the service role key for admin operations. Test each table's access from both anon and authenticated roles before launch.

-- Example: Users can only read their own rows
CREATE POLICY "user_own_data" ON profiles
  FOR SELECT USING (auth.uid() = user_id);

Mistake #4: Not Migrating Auth Users Properly

Migrating your database but forgetting your users means everyone gets logged out. Worse, if you recreate users with different IDs, all your foreign key references to auth.users break.

How to avoid it: Use Supabase's Auth admin API to import users with their existing IDs. Send password reset emails to all users post-migration rather than trying to migrate hashed passwords across different systems.

Mistake #5: Skipping Performance Testing

An app that ran fine on Lovable Cloud might crawl on Supabase if you haven't added proper indexes. Query patterns change with schema changes, and default Supabase connection pooling settings may not suit your traffic.

How to avoid it: Run EXPLAIN ANALYZE on your 10 most common queries. Add indexes for all columns used in WHERE, JOIN, and ORDER BY clauses. Configure PgBouncer connection pooling settings based on your expected concurrent connections.

The Safe Migration Approach

1. Audit your current schema and data
2. Set up Supabase and run schema migration
3. Do a full data migration in staging
4. Test all API endpoints against the new backend
5. Configure RLS policies and test access control
6. Do a final data sync (incremental)
7. Switch traffic with a short maintenance window
8. Monitor for 48 hours before decommissioning old system

If you want this process done right with zero downtime, our team handles end-to-end migrations from Lovable Cloud to Supabase.