Aciu jums labai, padejo!

Laba diena, dekoju, o kas yra DB? Ir kaip pataisyti?

Laba diena, ar galite man padeti? Kazkas atsitiko su saskaitomis ir meta sia klaida, negaliu nieko koreguoti ir rasyti nauju saskaitu. Laukeliai pilki ir neaktyvuoti net. Skubiai reikalinga pagalba. Klaidos duomenys:
Klaidos tekstas:
DataPortal.Fetch failed (System.Exception: Klaida. Nepavyko gauti kešuojamo objekto, kurio tipas 'ApskaitaObjects.HelperLists.DocumentSerialInfoList'. Exception has been thrown by the target of an invocation. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Exception: Enumeracijos tipo ApskaitaObjects.Settings.DocumentSerialType vertė, duomenų bazėje pažymėta kodu sąskaita - faktūra, nežinoma.
at ApskaitaObjects.Utilities.ConvertEnumDatabaseStringCode[T](String DatabaseStringCode)
at ApskaitaObjects.HelperLists.DocumentSerialInfo.Fetch(DataRow dr)
at ApskaitaObjects.HelperLists.DocumentSerialInfo..ctor(DataRow dr)
at ApskaitaObjects.HelperLists.DocumentSerialInfoList.DataPortal_Fetch(Criteria criteria)
at ApskaitaObjects.HelperLists.DocumentSerialInfoList.GetListOnServer()
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at AccDataAccessLayer.CacheObjectList.DataPortal_Fetch(Criteria criteria)
--- End of inner exception stack trace ---
at AccDataAccessLayer.CacheObjectList.DataPortal_Fetch(Criteria criteria))
Klaidos šaltinis(Ex.Source):
Csla
Klaidos metodas (Ex.TargetSite):
Fetch
Klaidos stekas:
at AccDataAccessLayer.CacheObjectList.DataPortal_Fetch(Criteria criteria)
at Csla.MethodCaller.CallMethod(Object obj, MethodInfo info, Object[] parameters)
at Csla.Server.SimpleDataPortal.Fetch(Type objectType, Object criteria, DataPortalContext context)
at Csla.DataPortal.Fetch(Type objectType, Object criteria)
at Csla.DataPortal.Fetch[T](Object criteria)
at AccDataAccessLayer.CacheObjectList.GetList(Type[] nBaseType)
at ApskaitaWUI.CachedListsLoaders.PrepareCache(Form& CallingForm, Type[] nBaseType)

----------------------------
Vidinės klaidos (internal exception) duomenys:
Klaidos tekstas:
DataPortal_Fetch method call failed
Klaidos šaltinis(Ex.Source):
Csla
Klaidos metodas (Ex.TargetSite):
CallMethod
Klaidos stekas:
at AccDataAccessLayer.CacheObjectList.DataPortal_Fetch(Criteria criteria)
at Csla.MethodCaller.CallMethod(Object obj, MethodInfo info, Object[] parameters)
at Csla.Server.SimpleDataPortal.Fetch(Type objectType, Object criteria, DataPortalContext context)

----------------------------
Vidinės klaidos (internal exception) duomenys:
Klaidos tekstas:
Klaida. Nepavyko gauti kešuojamo objekto, kurio tipas 'ApskaitaObjects.HelperLists.DocumentSerialInfoList'. Exception has been thrown by the target of an invocation.
Klaidos šaltinis(Ex.Source):
AccDataAccessLayer
Klaidos metodas (Ex.TargetSite):
DataPortal_Fetch
Klaidos stekas:
at AccDataAccessLayer.CacheObjectList.DataPortal_Fetch(Criteria criteria)

----------------------------
Vidinės klaidos (internal exception) duomenys:
Klaidos tekstas:
Exception has been thrown by the target of an invocation.
Klaidos šaltinis(Ex.Source):
mscorlib
Klaidos metodas (Ex.TargetSite):
_InvokeMethodFast
Klaidos stekas:
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at AccDataAccessLayer.CacheObjectList.DataPortal_Fetch(Criteria criteria)

----------------------------
Vidinės klaidos (internal exception) duomenys:
Klaidos tekstas:
Enumeracijos tipo ApskaitaObjects.Settings.DocumentSerialType vertė, duomenų bazėje pažymėta kodu sąskaita - faktūra, nežinoma.
Klaidos šaltinis(Ex.Source):
ApskaitaObjects
Klaidos metodas (Ex.TargetSite):
ConvertEnumDatabaseStringCode
Klaidos stekas:
at ApskaitaObjects.Utilities.ConvertEnumDatabaseStringCode[T](String DatabaseStringCode)
at ApskaitaObjects.HelperLists.DocumentSerialInfo.Fetch(DataRow dr)
at ApskaitaObjects.HelperLists.DocumentSerialInfo..ctor(DataRow dr)
at ApskaitaObjects.HelperLists.DocumentSerialInfoList.DataPortal_Fetch(Criteria criteria)
at ApskaitaObjects.HelperLists.DocumentSerialInfoList.GetListOnServer()