Create LedgerDimension by financial dimension by X++

Hi,

I am trying to create get the voucher journal account (just like field ledgerDimension in table LedgerJournalTrans).

AX provide the standard code to do this, which is as below

        acctDimAttrArray                    = new Array(Types::String);
        acctDimAttrArray.value(1,"MainAccount");
        acctDimAttrArray.value(2,"BU");
        acctDimAttrArray.value(3,"Type");
        acctDimAttrArray.value(4,"Section");

        acctDimArray                        = new Array(Types::String);   
        acctDimArray.value(1,"123456");
        acctDimArray.value(2,"AAA");
        acctDimArray.value(3,"LLL");
        acctDimArray.value(4,"UUU");
       
        DefaultDimensionIntegrationValues   = DimensionResolver::getEntityDisplayValue(acctDimAttrArray, acctDimArray, extendedTypeStr(DimensionDynamicAccount), LedgerJournalACType::Ledger);
        DimensionDynamicAccountResolver     = DimensionDynamicAccountResolver::newResolver(DefaultDimensionIntegrationValues, LedgerJournalACType::Ledger, ext());
        _InsertLedgerJournalTrans.LedgerDimension  = DimensionDynamicAccountResolver.resolve();

Everything looks find as it will correct ID for me. But finally, I found every time the method DimensionDynamicAccountResolver.resolve() return me a valid recId, meanwhile, it will also insert a record in a cache table. The insert method is like below,

    /// <summary>
    /// Adds a dimension data entity cache entry for the specified resolved value and the current resolution arguments.
    /// </summary>
    /// <param name="_savedRecId">
    /// The resolved record ID.
    /// </param>
    protected void addCacheEntry(RefRecId _savedRecId)
    {
        DimensionDataEntitySFKCache dimensionDataEntitySFKCache;
        dimensionDataEntitySFKCache.ResolvedReference = _savedRecId;
        dimensionDataEntitySFKCache.IntegrationString = this.parmDimensionValues();

        dimensionDataEntitySFKCache.ExtendedDataType = this.getExtendedDataTypeName();
        dimensionDataEntitySFKCache.EnumValue = this.getEnumValue();
        dimensionDataEntitySFKCache.EnumName = this.getEnumName();
        dimensionDataEntitySFKCache.SecondaryEnumValue = this.getSecondaryEnumValue();

        dimensionDataEntitySFKCache.HierarchyName = this.getDimensionHierarchyName();
        dimensionDataEntitySFKCache.HierarchyType = this.getDimensionHierarchyType();

        UserConnection userConnection = new UserConnection();

        try
        {
            dimensionDataEntitySFKCache.setConnection(userConnection);

            userConnection.ttsbegin();
            
            dimensionDataEntitySFKCache.insert();

            userConnection.ttscommit();
        }
        catch (Exception::DuplicateKeyException)
        {
            // The record is already cached, so just abort the transaction.
            if (userConnection.ttsLevel() > 0)
            {
                userConnection.ttsabort();
            }
        }
        finally
        {
            userConnection.finalize();
        }
    }

In my case, if I return the same LedgerDimension in the second time, this cache table will pop duplicate error. I just not quite understand why I do something like searching by method DimensionDynamicAccountResolver.resolve() will case record insert and even duplicate in a cache table. And how can I overcome it? Thanks!