Server Error in '/' Application.

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 


[SqlException (0x80131904): Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.]
   System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +3318108
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +736
   System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +4061
   System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() +90
   System.Data.SqlClient.SqlDataReader.get_MetaData() +99
   System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted) +604
   System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest) +3303
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry) +667
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +83
   System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +301
   System.Data.SqlClient.SqlCommand.ExecuteReader() +137
   Database.DBConnector.GetDataReader() in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\Libraries\KidCheck_Database\DBConnector.cs:209
   KCCheckin.Common.PublicSecurity.Authenticate(String username, String strPassword, String sourceIP, Boolean overrideLockout) in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\Libraries\KidCheck_Common\PublicSecurity.cs:430
   KCCheckin.Common.PublicSecurity.Authenticate(String username, String strPassword, String sourceIP) in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\Libraries\KidCheck_Common\PublicSecurity.cs:415
   KCCheckin.Public.signin.Signin() in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\webroot\signin.aspx.cs:1224
   KCCheckin.Public.signin.btnSignin_Click(Object sender, EventArgs e) in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\webroot\signin.aspx.cs:1218
   Telerik.Web.UI.RadButton.OnClick(ButtonClickEventArgs e) +129
   Telerik.Web.UI.RadButton.RaisePostBackEvent(String eventArgument) +299
   System.Web.UI.<ProcessRequestMainAsync>d__523.MoveNext() +8794