HistoryDB / Job Chain "VI_SourceDatabase_Import " runs on Frozen

Hello,

We use version 8.0.3 in our test environment. We use two SQL servers - one for the main database and one for the history DB.

We have set up historization to the extent that it should work. The connection between the two SQL servers is also available and functional. 

However, the job that is to transfer the historical data goes to the FROZEN status. The error message for this is as follows

ErrorMessages (2020-01-17 07:20:49.827) [810023] Error during execution of statement: exec HDB_PGetRawFromSource N'<DB-Server>', N'DB-Name', N'DB-User', N'DB-User-Password', 0
[810143] Database error 50000: re-throw in Procedure HDB_PGetRawFromSource_Intern, Line 320
[810143] Database error 547: detected in (SRV=<DB-Server>, DB=<DB-Name>) Direct SQL cmd, Line 2
Code starting with:

insert into sourcecolumn (
ColumnName,
Commentary,
CustomCaption,
SourceObjectKey,
UID_DialogTable,
UID_DialogColumn
)
select
ColumnName,
left(Commentary, 1024),
left(Caption, 255),
XObjectKey,
UID_DialogTable,
UID_DialogColumn
from Q128E06C2B35C7703E93E8F1A57590B2F623DF9C6."IMSS1".dbo.Dialogcolumn x
where not exists (select top 1 1 from sourcecolumn c
where c.uid_dialogColumn = x.uid_dialogColumn collate database_def
[810143] Database error 547: The INSERT statement conflicted with the FOREIGN KEY constraint "HDB_RFRL1013". The conflict occurred in database "Name History-DB", table "dbo.SourceTable", column 'UID_DialogTable'.
at VI.JobService.ProcessorThread._ExecuteJob(Job job, JobResult result)
at VI.JobService.JobComponents.SQLComponent.Task_Execute()
at VI.Base.SyncActions.Do[T](Func`1 function)
at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
---- Start of Inner Exception ----
at VI.DB.DataAccess.ReadWriteDbSession.<SqlExecuteNonQueryAsync>d__14.MoveNext()
---- Start of Inner Exception ----
at VI.DB.DataAccess.ReadWriteDbSession.<SqlExecuteNonQueryAsync>d__14.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
--- End of stack trace from previous location where exception was thrown ---
at VI.DB.DataAccess.ReadWriteDbSession.<IgnoreBrokenConnectionAsync>d__46`1.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
--- End of stack trace from previous location where exception was thrown ---
at VI.DB.DataAccess.ReadWriteDbSession.<_SqlExecuteNonQueryAsync>d__15.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
--- End of stack trace from previous location where exception was thrown ---
at VI.DB.DataAccess.ReadOnlyDbSession.<ExecuteAndLogAsync>d__95`1.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
--- End of stack trace from previous location where exception was thrown ---
at VI.DB.DataAccess.ReadOnlyDbSession.<ExecuteAndLogAsync>d__96`1.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
--- End of stack trace from previous location where exception was thrown ---
at VI.DB.DataAccess.SafeDbCommand.<ExecuteNonQueryAsync>d__16.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
--- End of stack trace from previous location where exception was thrown ---
at VI.DB.DataAccess.SafeDbCommand.<_CheckedAsync>d__40`1.MoveNext()
---- Start of Inner Exception ----

---- Start of Inner Exception ----

What could be the cause of the error? How can you solve this error?
Thank you for any information

Kind regards