Error on executing DB command: System.Data.SqlServerCe.SqlCeException (0x80004005)

[Sweet&Sour]

I've tried to add a strategy using an instrument list. After adding them, i saw the following errors in the log:

Error on executing DB command: System.Data.SqlServerCe.SqlCeException (0x80004005): A duplicate value cannot be inserted into a unique index. [ Table name = Strategies,Constraint name = PK__Strategies__00000000000003AB ]
at System.Data.SqlServerCe.SqlCeCommand.ProcessResult s(Int32 hr)
at System.Data.SqlServerCe.SqlCeCommand.ExecuteComman dText(IntPtr& pCursor, Boolean& isBaseTableCursor)
at System.Data.SqlServerCe.SqlCeCommand.ExecuteComman d(CommandBehavior behavior, String method, ResultSetOptions options)
at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQue ry()
at NinjaTrader.NinjaScript.StrategyBase.DbAdd()
at NinjaTrader.Cbi.DB.DBThread()

It seems that all strategies are running but what should i do with all these errors?

[NinjaTrader_ChristopherJ]

Hello,

To resolve this error please follow the instructions below to reset the NinjaTrader database. (This can take longer depending on the size of your database file and your system.)

• Disconnect NinjaTrader from any open connections via File > Disconnect.
• From the NinjaTrader Control Center window select the menu Tools > Options.
• Select the 'Data' tab.
• Press the 'Reset DB' button.
• Press the 'OK' button.

The following data will be removed.

• Historical orders.
• Historical executions.
• Historical ATM strategy data.
• Saved Strategy Analyzer backtest results.

The following data will be maintained.

• ATM strategy templates.
• Historical chart data.

[johnnybegoode]

How do I reset DB on Ninjatrader 8.0.18?

[NinjaTrader_ChrisSch]

Hello johnnybegoode,

Thank you for your note.

We advise that you use the instructions below to reset the NinjaTrader database.

• Disconnect NinjaTrader from any open connections via Connections > Disconnect
• From the NinjaTrader Control Center window select the menu Tools > Database Management
• Press "Reset DB"
• Check Historical Orders to remove historical orders
• Check Historical Trades to remove historical trades
• Press the "Reset" button

Please let us know if we may be of further assistance.