cubicweb-tracker #2991874 migration to 1.13.0 looks broken [resolved]

- migration script in 1.12.2_Any.py instead of 1.13.0
- migration script drops a relation that is supposedly moved to forge, but forge doesn't add it, so an app using forge would be broken after the migration, as far as i can tell...

priorityimportant
typebug
done in1.14.0
load0.500
load left0.000
closed by#41427b3714ff migration: don't remove the see_also relation definitions
patchmigration: don't remove the see_also relation definitions [applied]