Errors on Update

I got errors while upgrading from 1.3 to 1.4:
No Idea what this means and what is the reason.

warning: array_merge() [function.array-merge]: Argument #2 is not an array in /..../webseiten/drupal/update.php on line 174.
warning: Invalid argument supplied for foreach() in /..../webseiten/drupal/update.php on line 338.

The following queries were executed
simplenews_template module
Update #6001
No queries
uc_coupon module
Update #6002
ALTER TABLE {uc_coupons} ADD `valid_from` INT DEFAULT NULL
UPDATE {uc_coupons} SET valid_from = 0
Update #6003
ALTER TABLE {uc_coupons} CHANGE `name` `name` VARCHAR(255) NOT NULL DEFAULT ''
Update #6004
ALTER TABLE {uc_coupons} CHANGE `value` `value` DECIMAL(10, 2) NOT NULL DEFAULT 0
ALTER TABLE {uc_coupons} CHANGE `minimum_order` `minimum_order` DECIMAL(10, 2) NOT NULL DEFAULT 0
Update #6005
ALTER TABLE {uc_coupons} CHANGE `code` `code` VARCHAR(100) NOT NULL DEFAULT ''
ALTER TABLE {uc_coupons_orders} CHANGE `code` `code` VARCHAR(100) NOT NULL DEFAULT ''