OrderServiceTest failure

This test "OrderServiceTest saveOrder_shouldThrowAmbiguousOrderExceptionIfDisconnectingMultipleActiveOrdersForTheGivenConcepts" is failing on all branches where it exists.

That is 1.10.x, 1.11.x, 1.12.x, 2.0.x, 2.1.x, and master.
It has always run successfully until all of the sudden, it started failing. I first detected it on our Sonar CI https://ci.openmrs.org/browse/SON-OPENMRSCOREMASTER/latest

All other platform CI builds were green. So i decided to manually run them and they all failed. I even tried them out locally and they still failed.
Am trying to investigate, but just wanted to mention it here just in case some one has an answer that will save my time, for it seems obvious.