Missing entry in CDash

On my MR: https://gitlab.kitware.com/vtk/vtk/merge_requests/5651
This build is complete: https://buildbot.kitware.com/grid?branch=LPTImprovements&category=vtk-expected
But only a few are visible in cdash : https://open.cdash.org/index.php?compare1=61&filtercount=1&field1=revision&project=VTK&showfilters=0&limit=100&value1=3ec13d45f5ccebeef88790dd6fe66ba842f52686&showfeed=0

stdio contains an error:

Submit files
   Send to track: merge-requests
   SubmitURL: http://open.cdash.org/submit.php?project=VTK
   Uploaded: /home/kitware/Dashboards/buildslave/vtk_master-luigi-linux-shared-release_mpi_python2_tbb/build/Testing/20190614-0953/Test.xml
   Submission successful
skipping upload 
  ctest_upload_file_patterns: `` 
  ctest_stages: `all`
   build_number_errors: `0`
   success: `TRUE`
   ctest_upload_with_test_failures: `True`
	Add file: /home/kitware/Dashboards/buildslave/vtk_master-luigi-linux-shared-release_mpi_python2_tbb/common.ctest
	Add file: /home/kitware/Dashboards/buildslave/vtk_master-luigi-linux-shared-release_mpi_python2_tbb/ctest_extra_options.cmake
	Add file: /home/kitware/Dashboards/buildslave/vtk_master-luigi-linux-shared-release_mpi_python2_tbb/build/cmake-version.txt
	Add file: /home/kitware/Dashboards/buildslave/vtk_master-luigi-linux-shared-release_mpi_python2_tbb/build/CMakeCache.txt
Submit files

Seems that CDash was having some trouble when the first round of Update.xml files were updated:

   Submission failed: Cannot connect to the database.
   Uploaded: /home/kitware/dashboards/buildbot/vtk_master-duma-linux-shared-release_osmesa_ospray/build/Testing/20190614-0953/Update.xml
   Errors occurred during submission.

You can see all of them here: https://open.cdash.org/index.php?project=VTK&date=2019-06-14&filtercount=1&showfilters=1&field1=buildname&compare1=63&value1=LPTImprovements