## -8049: Prepare migration required

### Explanation:

Once you had imported SAP DB Version 7.4, you were not able to start the INPLACE migration because no preparations had been made in the original database version for migration.

### User Action:

...

1. Import the original database version again.

2. Switch the database instance to ONLINE mode.

3. Shut down the database instance.

4. Run the Database Manager CLI command migrate in a utility session while the database is in ADMIN mode.

This deletes data that is no longer support in Version 7.4.

5. Import Version 7.4 again and restart the INPLACE migration.