The database schema of the source and target databases do not match. For subsetting to work correctly, the source and target databases must have the same schema.

How to fix

Ensure schema alignment between your source and target databases before running the subsetter.

Steps 

1. Compare database schemas - check table structures, column names, and data types
2. Update target database to match the source schema
3. Deploy schema changes using your preferred database deployment tool
4. Verify alignment before re-running the subsetter

Common mismatches

Missing tables: Target database lacks tables present in source

Column differences: Different column names, data types, or constraints

Schema versions: Source database updated but target still on older version

Index variations: Different indexes between databases (may cause warnings)

Bypassing this check

If you're confident the schemas are compatible despite differences, use:

rgsubset run --force

Warning: Using --force may cause subsetting to fail if schemas are truly incompatible.