We run on Oracle EE 11.2.0.4 and get this error:

Error report -
ORA-00001: unique constraint (UT3.UT_ANNOTATION_CACHE_PK) violated
ORA-06512: at "UT3.UT_RUNNER", line 101
ORA-06512: at "UT3.UT", line 105
ORA-06512: at "UT3.UT", line 270
ORA-06512: at "UT3.UT", line 322
ORA-06512: at line 2

1. 00000 - "unique constraint (%s.%s) violated"
   *Cause: An UPDATE or INSERT statement attempted to insert a duplicate key.
   For Trusted Oracle configured in DBMS MAC mode, you may see
   this message if a duplicate entry exists at a different level.
   *Action: Either remove the unique restriction or do not insert the key.

Downgrading to 3.0.3 fix the problem.