Hi,

I can't figure out why when I remove an option symbol from the universe, its symbol changes to something else.

I attached the python code where I logged security symbol when security is added or removed and here's an example of what's logged:

2019-01-02 09:31:00 Added:SPY 190118P00246000, Underlying:SPY R735QTJ8XC9X, Strike:246.0, Type: 1, Date:2019-01-18 00:00:00 2019-01-03 00:00:00 Removed:SPY 310F3UW6H4U06|SPY R735QTJ8XC9X, Underlying:SPY R735QTJ8XC9X, Strike:246.0, Type: 1, Date:2019-01-18 00:00:00

Option symbol was `SPY   190118P00246000` when it's added but it became `SPY 310F3UW6H4U06|SPY R735QTJ8XC9X` when it's removed.

Can anyone explain why it's like this? Is it a bug?

Author