beam_LoadTests_Python_GBK_reiterate_Dataflow_Streaming failure

https://ci-beam.apache.org/job/beam_LoadTests_Python_GBK_reiterate_Dataflow_Streaming/ starts failing since 04/27.

This is likely caused by dataflow runner v2 update which enforces SDF semantics on restrictions more strongly than previously. The error message is 
JOB_MESSAGE_ERROR: generic::invalid_argument: Last primary index cannot decrease from previous split, was 0 and is now -1