Bug found for "this system trades"

I found a small bug in your system. If I click create a new system, it asks me to select some option buttons for – this system trades – at the very top. One of the items in indexes. However, once the system is set up, you can go to the home page for that system and select admin --> edit details and indexes is no longer an option. In fact, if you click on this screen and simply click "save" right after loading it, without making any changes, it gives the following error: Please select a known trading instrument --> Please specify the kind of trading instrument your system focuses on.

All in all, it appears indexes is an option when first setting up a system but is no longer an option if you decide to edit your new system. [LINKSYSTEM_33365603]