knex rollback issue

gistfile1.txt

Knex:warning - migration 20151111160500_move_parent_ing_id_out_of_data.js did not return a promise
Knex:warning - migrations failed with error: DROP FUNCTION set_updated_timestamp() - cannot drop function set_updated_timestamp() because other objects depend on it
error: DROP FUNCTION set_updated_timestamp() - cannot drop function set_updated_timestamp() because other objects depend on it
    at Connection.parseE (/vagrant/node_modules/pg/lib/connection.js:539:11)
    at Connection.parseMessage (/vagrant/node_modules/pg/lib/connection.js:366:17)
    at Socket.<anonymous> (/vagrant/node_modules/pg/lib/connection.js:105:22)
    at emitOne (events.js:77:13)
    at Socket.emit (events.js:169:7)
    at readableAddChunk (_stream_readable.js:146:16)
    at Socket.Readable.push (_stream_readable.js:110:10)
    at TCP.onread (net.js:523:20)