Violation of UNIQUE INDEX deleted the property from the all the all ready existed vertex

[krishna....@gmail.com]

Hi,

i have created a Unique Composite Index for vertices with id, name properties.

1. create a vertex with an id(-109), name("test").
2. take the already created vertex which is having different id(-201654672484678624),name('test") which are having few properties like age, createdTime, gender, etc
3. try to update the already available vertex stated in point 2 with id(-109) of vertex stated in point 1
4. then the following exception is thrown which is expected
   1. Adding this property for key [id] and value [-109] violates a uniqueness constraint [newUniqueIndex]Type ':help' or ':h' for help.Display stack trace? [yN]yorg.janusgraph.core.SchemaViolationException: Adding this property for key [id] and value [-109] violates a uniqueness constraint [newUniqueIndex]{{ at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.addProperty(StandardJanusGraphTx.java:817)}}{{ at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.addProperty(StandardJanusGraphTx.java:745)}}{{ at org.janusgraph.graphdb.vertices.AbstractVertex.property(AbstractVertex.java:152)}}{{ at org.janusgraph.core.JanusGraphVertex.property(JanusGraphVertex.java:72)}}{{ at org.janusgraph.core.JanusGraphVertex.property(JanusGraphVertex.java:33}}{{}}
5. But the unexpected thing happening is the id(-201654672484678624) property of the vertex stated in point is removed from it

Note: i am using cassandra as backend and ES for indexing

can you please help me to solve the issue as there is a loss in data as we can't retrive the data which is lost.

attaching the console logs of reproducing the issue through gremlin console

Thanks

Krishna Jalla