Rollback transaction after failed operations before retrying

start.sh

@@ -19,7 +19,6 @@ python -c "
 from web_app import create_app
 from web_app.models import db, User
 from config import Config
-import sqlalchemy
 
 print(f'SECRET_KEY set: {bool(Config.SECRET_KEY)}')
 print(f'IS_PRODUCTION: {Config.IS_PRODUCTION}')
@@ -34,12 +33,16 @@ with app.app_context():
         print(f'✅ Database working ({user_count} users)')
     except Exception as check_error:
         print(f'Database needs setup: {str(check_error)[:100]}')
+        db.session.rollback()  # Clear any failed transaction
+        
         try:
             # Try to create tables
             db.create_all()
             print('✅ Database schema created!')
         except Exception as create_error:
             error_msg = str(create_error)
+            db.session.rollback()  # Rollback failed transaction
+            
             # If error is just 'already exists', check if database actually works
             if 'already exists' in error_msg.lower():
                 print('⚠️  Create returned already exists error, testing database...')