Redmine

I was copy&pasting some text with an Picture to the Issue notes. It gave me an awesome (working) preview, but a Redmine 500 error while saving (Internal error page was shown). My log-file reads:

ActiveRecord::StatementInvalid (Mysql2::Error: Data too long for column 'notes' at row 1: INSERT INTO `journals` (`journalized_id`, `journalized_type`, `user_id`, `notes`, `created_on`) VALUES (8127, 'Issue', 104, '<p><img src=\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAl0AAADuCAYAAAADQ7LZAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAA...

...CYII=\" /></p>\r\n', '2016-02-29 10:11:41')):
  app/models/journal.rb:67:in `save'
  app/models/issue.rb:1659:in `create_journal'
  app/models/issue.rb:182:in `create_or_update'
  app/controllers/issues_controller.rb:487:in `block in save_issue_with_child_records'
  app/controllers/issues_controller.rb:475:in `save_issue_with_child_records'
  app/controllers/issues_controller.rb:180:in `update'
  lib/redmine/sudo_mode.rb:63:in `sudo_mode'