Can't add property

[annhve]

Hello everyone! I am trying to copy some data from Mci to Janusgraph(storage Cassandra). But I have some problem and get this Error :
ERROR 1 --- [io-8080-exec-33] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.janusgraph.core.SchemaViolationException: Adding this property for key [ALIAS] and value [22203-tour22] violates a uniqueness constraint [aliasIndex]] with root cause
Is this problem in the indexes?

[li-boxuan]

As the error message suggests, looks like you have created a composite index [aliasIndex] with the uniqueness constraint. You got the exception because the value [22203-tour22] already exists for key [ALIAS].

[annhve]

Probably It's true. Many thanks