UpdateSingleSFObject function is not working correctly

Question

I need help with my code snippet. It's part of an automation that first of all use a query to get the emails from contacts that I need to update in Salesforce CRM. Next to get the emails, I execute a Script activity that calls a Code Snippet in Content Builder. The Script only works when the email from the query has one suscription to update. If the email has more than one suscription asociated, the script fails. Could you give some help with this?

I did some test and I think the problem is with the function "UpdateSingleSalesforceObject" because if I execute the code in a landing page repeatedly finally I get that all my records had been updated. But I need to do this repeatedly, and obviously in a Script activity I can't do this. So, anyone has any idea about the solution?

Thanks for all, this is the code:

<script runat="server">
Platform.Load("Core","1.1.1");
try{
</script>

%%[ 

var @rows, @rowCount

set @rows = LookupRows('MyDataExtension','Motivo_baja', 'Baja mediante el servidor de correo')
set @rowCount = rowcount(@rows)

if @rowCount > 0 then
   var @row, @emailAddress, @status, @dateUnsubscribed, @rsoSuscripciones, @suscripcionesCount
  
   for @I=1 to @rowCount do   
      set @row = row(@rows, @I)
      set @emailAddress = field(@row,"emailAddress")
      set @subkey = field(@row,"Subscriberkey")
      set @status = 'unsubscribed'
      set @dateUnsubscribed = FormatDate(field(@row,"UnsubDate"),"iso")
  
     set @rsoSuscripciones = RetrieveSalesforceObjects(
        "suscriptionObjectinSF",
        "id",
        "email__c", "=", @emailaddress,
        "suscrito__c","=","true")        
     set @suscripcionesCount = RowCount(@rsoSuscripciones)       
   
 if @suscripcionesCount > 0 then
       var @suscripcionesRow, @idSuscripcion, @updateSF, @unsubscribedError,@rowsSub, @rowCountSub
      
      for @J=1 to @suscripcionesCount do
         set @suscripcionesRow = Row(@rsoSuscripciones, @j)
         set @idSuscripcion = Field(@suscripcionesRow, 'Id')
         set @updateSF =  UpdateSingleSalesforceObject('suscriptionObjectinSF', @idSuscripcion, "suscrito__c", "false", "fechaBaja__c",   @dateUnsubscribed, "motivoBaja__c", @motivoBaja)

  next @j
   endif 
   UPDATEDE('LogDataExtension', 2, 'EmailAddress', @emailAddress, 'procesado', 'false', 'procesado', 'true')
  next @I
endif
]%%

<script runat="server">
}
catch(e) {
 Variable.SetValue("errorMessage", Stringify(e.description));
}
</script>