After updating to beta4 - PDOException: SQLSTATE[42S22]: Column not found

I tried to update Entity Translation from beta3 to beta4. Beta3 version works fine but after updating to the latest version I get the following errors:

PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'revision_id' in 'field list': INSERT INTO {entity_translation} (entity_type, entity_id, revision_id, language, source, uid, status, translate, created, changed) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9), (:db_insert_placeholder_10, :db_insert_placeholder_11, :db_insert_placeholder_12, :db_insert_placeholder_13, :db_insert_placeholder_14, :db_insert_placeholder_15, :db_insert_placeholder_16, :db_insert_placeholder_17, :db_insert_placeholder_18, :db_insert_placeholder_19); Array ( [:db_insert_placeholder_0] => node [:db_insert_placeholder_1] => 88 [:db_insert_placeholder_2] => 88 [:db_insert_placeholder_3] => de [:db_insert_placeholder_4] => [:db_insert_placeholder_5] => 34 [:db_insert_placeholder_6] => 1 [:db_insert_placeholder_7] => 0 [:db_insert_placeholder_8] => 1424283755 [:db_insert_placeholder_9] => 1432551974 [:db_insert_placeholder_10] => node [:db_insert_placeholder_11] => 88 [:db_insert_placeholder_12] => 88 [:db_insert_placeholder_13] => en [:db_insert_placeholder_14] => de [:db_insert_placeholder_15] => 34 [:db_insert_placeholder_16] => 1 [:db_insert_placeholder_17] => 0 [:db_insert_placeholder_18] => 1424885156 [:db_insert_placeholder_19] => 1432559576 ) in EntityTranslationDefaultHandler->doSaveTranslations() (line 611 of //sandbox/sites/all/modules/entity_translation/includes/translation.handler.inc).

I am no skilled coder but it looks like a bug to me. Could you have a look at this, please? Thanks.