Test Items management: When removing one of the test parameters from the script routine on which the test item is based, the rest test parameters values of this script routine don't keep in the Test Items GUI.

Hello, I created Test items in order to set the parameters for the test. The Test Item is based on a  script routine with parameters. I set the values for all parameters of the routine in the Test Items GUI. Then I deleted the first parameter in the script routine code, the rest of the parametres of this routine remained without change. Observed, that values of all parameters in the Test Items GUI were set as valiant type and unassigned. But I expect that the only the removed parameter should be removed, and the values for the rest of the parameters should be kept.