Apparently, some names in the database are too long and beyond SQLite’s limits. It stopped at this error:

@Index name ‘temp\_index\_altered\_timelines\_planning\_element\_types\_on\_project\_type\_id’ on table ‘altered\_timelines\_planning\_element\_types’ is too long; the limit is 64 characters/var/lib/gems/2.1.0/gems/activerecord-3.2.18/lib/active\_record/connection\_adapters/abstract/schema\_statements.rb:573:in \`add\_index\_options’

There might be more, but it said all later migrations are aborted. Begin of the insertion
End of the insertion