Edit ID numbers

hello there

I don’t know how to edit the ID of activity. If i delete one activity and create a new one, the ID is automatically set with progression that i have created.
Is it possible to edit the ID column?

ID in GanttProject is auto-generated and basically you don’t need to edit it or even rely on its values. Why do you want to edit ID?

Because, for exemple, if i create activity_1 and activity_2, then I delete activity_2 and create again activity_2 the ID of the last activity will be 3. I whis to edit ID to set again to 2.

I solved the problem adding a new column

You can delete the activity, save the project, close it, reopen the project and create new task. activity_2 will have ID 2 instead of 3 this time. It worked for me.