Unexpected or unsupported instrument

[motog4]

Hi,
I was having issues with the last 18.1 NT8 platform version and after downgrading it to version 17.2 I get errors such as "Unexpected or unsupported instrument. Full Instrument name ES 06-19".
I´ve tried to upgrade again but the same message shows up.

[NinjaTrader_PatrickG]

Resetting your instruments should resolve this item. To reset your instruments, please take the steps below.

1. First, disconnect from any data providers by navigating to the Control Center > Connections menu, and left-click on “disconnect” that appears to the right when hovering your mouse over any active connection
2. Next, reset your instruments by navigating to the Control Center > Tools > Database Management
3. In the Database Management window, under the “Update instruments” section, ensure that “General properties”, "Futures expiries" and “Symbol mappings” options are checked and then click Update
4. Lastly, restart NinjaTrader for the changes to occur