can not migrate the order data with delta migratio

it is fail When transferring order data from magento1. it shows 
php -f bin/ubdatamigration run --step=7 --mode=update
Processing in step #7…
Status: fail
Message: CDbCommand failed to execute the SQL statement: SQLSTATE[23000]: Integrity constraint violation: 1062 Dup licate entry ’44’ for key ‘PRIMARY’. The SQL statement executed was: INSERT INTO `salesrule` (`uses_per_customer`, `is_active`, `stop_rules_processing`, `is_advanced`, `sort_order`, `discount_amount`, `discount_step`, `apply_to_ shipping`, `times_used`, `is_rss`, `coupon_type`, `use_auto_generation`, `uses_per_coupon`, `simple_free_shipping` , `rule_id`, `name`, `description`, `from_date`, `conditions_serialized`, `actions_serialized`, `simple_action`) V ALUES (:yp0, :yp1, :yp2, :yp3, :yp4, :yp5, :yp6, :yp7, :yp8, :yp9, :yp10, :yp11, :yp12, :yp13, :yp14, :yp15, :yp16 , :yp17, :yp18, :yp19, :yp20),
this is the the delta migration.

Thank you so much.