Cannot delete bookable resource booking from sdk method. Throws and error " 'bookableresourcebooking With Id = **** Does Not Exist"

Cannot Delete the record which is existing inside dynamics

In result I'm able to fetch the record but still it throws record doesn't exisits

var fetchXml1 = @"<fetch mapping='logical'>
                                      <entity name='bookableresourcebooking'>
                                        <attribute name='bookableresourcebookingid' />
                                          <attribute name='name' alias='bookableresourcebookingname'/>
                                        <filter type='and'>
                                          <condition attribute='bookableresourcebookingid' operator='eq' value='" + bookableResourceBooking + @"' />
                                        </filter>
                                      </entity>
                                    </fetch>";

                    EntityCollection result2 = organizationProxy.RetrieveMultiple(new FetchExpression(fetchXml1));

                    DeleteRequest deleteRequest = new DeleteRequest
                    {
                        Target = new EntityReference(er.LogicalName, er.Id)
                    };

                    var response2 = (UpsertResponse)organizationProxy.Execute(deleteRequest);