reset migration fails on upgrade to 2.34 and can’t reset t to M1



I am having a terrible experience.

The process failed me, and now migrate: data -vvv –reset doesn’t work for me.

But the worst thing is that if I want to start from 0 i.e. delete m2_ tables in M1, the original store starts to go wrong.

I don’t know how to act

Any ideas??


[2020-03-25 17:23:55][INFO][mode: data][stage: data migration][step: EAV Step]: started 
28% [========>-------------------] Remaining Time: < 1 sec
In Mysql.php line 182:
 [PDOException (23000)]                                                                                                                                          
 SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '1-Migration_Default' for key 'ST1_EAV_ATTRIBUTE_SET_ENTITY_TYPE_ID_ATTRIBUTE_SET_NAME'