Patch #6 working perfectly, thanks :)
I tried almost everything I found here: patch 52, 56, 60, migration through drupal UI and using drush. Flag migration is perfectly succesful, but the Flagging migrations always failed:
Processed 378 items (0 created, 0 updated, 0 failed, 378 ignored) - done with 'upgrade_d7_flagging
The "flagging" table remains empty. No idea about why.
At the end I decided to migrate all flaggins programmatically: after all they are only 378 (nodes) and I need this once only. I exported data from the old database table to csv; I made a little script to read data, flag automatically nodes from csv. It works (except for flagging creation date, but I solved also this if anyone interested)
I upgraded the module to version 8.x-1.2, and I had to apply again the patch.
Shouldn't this patch be committed in the official version?
Same problem. I swtiched back to previous version...