Hi all.

I have a working website where our customer use Umbraco. We have created a couple of custom datatypes, and there have been no problems before today. Now they can't publish their new work, and I can see we get the following sql exception:

2015-12-03 10:37:12,311 [13] INFO  Umbraco.Core.Publishing.PublishingStrategy - [Thread 112] Content 'Test' with Id '0' has been published.
2015-12-03 10:37:12,343 [13] INFO  Umbraco.Core.Persistence.UmbracoDatabase - [Thread 112]    at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
   at System.Data.SqlClient.SqlDataReader.get_MetaData()
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteScalar()
   at StackExchange.Profiling.Data.ProfiledDbCommand.ExecuteScalar()
   at Umbraco.Core.Persistence.PetaPocoCommandExtensions.<>c__DisplayClassa.<ExecuteScalarWithRetry>b__9()
   at Umbraco.Core.Persistence.FaultHandling.RetryPolicy.ExecuteAction[TResult](Func`1 func)
   at Umbraco.Core.Persistence.PetaPocoCommandExtensions.ExecuteScalarWithRetry(IDbCommand command, RetryPolicy cmdRetryPolicy, RetryPolicy conRetryPolicy)
   at Umbraco.Core.Persistence.PetaPocoCommandExtensions.ExecuteScalarWithRetry(IDbCommand command, RetryPolicy retryPolicy)
   at Umbraco.Core.Persistence.PetaPocoCommandExtensions.ExecuteScalarWithRetry(IDbCommand command)
   at Umbraco.Core.Persistence.Database.Insert(String tableName, String primaryKeyName, Boolean autoIncrement, Object poco)

But I have no idea what the issue is, does anyone know how I can dig into this or help me cast some light on the issue?