Upgrade 3.0.28->3.0.30 causes NPE in my tests

Hello!
Upgrade to new release breaks my unit tests.
If i create and drop vertex inside transaction and vertex has unique index, I got NPE:
com.orientechnologies.orient.core.exception.OStorageException: Exception during execution of component operation inside of storage modelstest

Caused by: java.lang.NullPointerException: null
at com.orientechnologies.orient.core.index.OIndexUnique.lambda$new$0(OIndexUnique.java:56) [orientdb-core-3.0.30.jar:3.0.30]

github issue:

Hi @arch7tect

Thank you for reporting, we are taking in charge the issue.
I’ll give you an update on GitHub

Thanks

Luigi