Bak filer och rollback filer kan man ta bort dom?

[Lowi]

Hej

Jag håller på att migrerar min Joomla site från 1.5 till 2.5 och såg att jag har massa dubbletter i databasen.
Är det någon som vet om man kan ta bort dessa eller förstör man något då?

jos_dtregister_bak_categories
jos_dtregister_bak_codes
jos_dtregister_bak_config
jos_dtregister_bak_events_codes
jos_dtregister_bak_event_config
jos_dtregister_bak_export_fields
jos_dtregister_bak_fields
jos_dtregister_bak_field_event
jos_dtregister_bak_files
jos_dtregister_bak_group
jos_dtregister_bak_group_amount
jos_dtregister_bak_group_event
jos_dtregister_bak_group_member
jos_dtregister_bak_history
jos_dtregister_bak_locations
jos_dtregister_bak_prerequisite
jos_dtregister_bak_session
jos_dtregister_bak_sync
jos_dtregister_bak_user
jos_dtregister_bak_waiting

jos_dtregister_rollback_acos
jos_dtregister_rollback_aros
jos_dtregister_rollback_captcha
jos_dtregister_rollback_categories
jos_dtregister_rollback_codes
jos_dtregister_rollback_config
jos_dtregister_rollback_events_codes
jos_dtregister_rollback_event_config
jos_dtregister_rollback_event_detail
jos_dtregister_rollback_export_fields
jos_dtregister_rollback_export_settings
jos_dtregister_rollback_fee
jos_dtregister_rollback_feeorder
jos_dtregister_rollback_fields
jos_dtregister_rollback_field_event
jos_dtregister_rollback_files
jos_dtregister_rollback_group
jos_dtregister_rollback_group_amount
jos_dtregister_rollback_group_event
jos_dtregister_rollback_group_member
jos_dtregister_rollback_history
jos_dtregister_rollback_locations
jos_dtregister_rollback_member_field_values
jos_dtregister_rollback_paylater
jos_dtregister_rollback_payment
jos_dtregister_rollback_payment_config
jos_dtregister_rollback_permissions
jos_dtregister_rollback_prerequisite
jos_dtregister_rollback_prerequisite_category
jos_dtregister_rollback_repetitions
jos_dtregister_rollback_session
jos_dtregister_rollback_sync
jos_dtregister_rollback_user
jos_dtregister_rollback_user_field_values
jos_dtregister_rollback_waiting