Re-linking data source problem

I have used scripts like that (Migrated from SSRS2016 tp SSRS2019:

$SourceServer = "http://OldServer/ReportServer"
$TargetServer = "http://NewServer/ReportServer"
$SourceFolder = "/Prototypes/MS"
$TargetFolder = $SourceFolder

rs.exe -i "C:\RSS\ssrs_migration.rss" -e Mgmt2010 -s $SourceServer -v f=$SourceFolder -v ts=$TargetServer -v tf=$TargetFolder

I get message error:

Re-linking data source for item Payment report ... SUCCESS
Re-linking references for item Payment report ... FAILURE:
The item '/Prototypes/MSFinance/SQL_PEPCO_Connector_DAX' cannot be found. ---> Microsoft.ReportingServices.Diagnostics.Utilities.ItemNotFoundException: The item '/Prototypes/MSFinance/SQL_PEPC
O_Connector_DAX' cannot be found.

Migrating parameters for report Payment liabilities report ... SUCCESS
Migrating subscriptions for report Payment liabilities report: 2 items found.
Migrating subscription sub2_disable ... FAILURE:
The report server cannot process the report or shared dataset. The shared data source 'SQL_PEPCO_Connector_DAX' for the report server is not valid.

The problem Is that my report is in path /Prototypes/MS
but my DataSource is in Finance/SQL_PEPCO_Connector_DAX

and script generate wrong path to the DataSource
'/Prototypes/MSFinance/SQL_PEPCO_Connector_DAX'

Start with the ssrs_migration.rss script invoked by rs.exe and trace how the report path /Prototypes/MS is combined with the Finance data-source path. Reproduce the migration using the OldServer and NewServer example, then verify that the generated reference points to the data source without merging the folder names and that re-linking and subscription migration succeed.