Thanks a lot for your answer. However, this is what the user wants to avoid. For example, if in the first run the user selected value_1, value_2, value_3, value_4, value_5, value_6, value_7, and if in the second run the user wants to just swap value_3 and value_4 (see below), is there any other way than deleting all the selection and start over again? Thanks a lot in advance again for any help!
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