I m a beginner in magento 2.
I m trying to migration our database from M1 to M2
I have to transform some datas. One module is different and i have to modifye the data before to save it .
but the migration take without this transformation around 2h.
How to try modification without migrated everything?
Is it possible to migrate a uniq table?
Should i exlude all table on map.xml? Is there any easier way?
Thanks a lot