[rules-users] Editing Action in Guided decision table ruins the action.

Hello everyone, I'm using the latest stable kie workbench (6.0.1.Final) and I have created a guided decision table containing an action with free form brl. Whenever I try to edit this action and press apply changes, kie workbench will duplicate the action (creating the new/edited action, while keeping the old one) and will not allow me to remove (by clicking on the minus icon) the old action. If I try to validate the guided decision table, I get an error saying "Unable to complete your request. The following exception occurred: rowData contains a different number of columns to those provided". The only solution I found is to remove the action that I need to edit and re-create it. But this means that I have to re-enter the parameters in my rules. Example action: /*MyUtils is a custom class and I am calling a static method passing arguments: a string taken as a parameter from each rule and a Level object matched in the rule. */ MyUtils.calculateLevel( "@{level_value}", $level); The issue appears if I try to change that by clicking on the edit (pencil) icon to (or any other change actually): MyUtils.calculateLevel("@{level_value}", "@{another_value}", $level); Kind regards