esta es la falla

Caused by: java.sql.BatchUpdateException: Batch entry 5 INSERT INTO
OBSERVACION (obs_valor, obs_fecha, est_id, tip_id, uni_id, fen_id)
VALUES ('0', '2013-11-26 16:02:00.000000 -05:00:00', 'GPRS1', 'Nivel',
'NA', 'temperature-Max') was aborted.  Call getNextException to see the
cause.
at
org.postgresql.jdbc2.AbstractJdbc2Statement$BatchResultHandler.handleError(AbstractJdbc2Statement.java:2621)
at
org.postgresql.core.v3.QueryExecutorImpl$1.handleError(QueryExecutorImpl.java:459)
at
org.postgresql.core.v3.QueryExecutorImpl$ErrorTrackingResultHandler.handleError(QueryExecutorImpl.java:348)
at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1837)
at
org.postgresql.core.v3.QueryExecutorImpl.sendQuery(QueryExecutorImpl.java:1091)
at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:398)
at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2754)
at
org.eclipse.persistence.internal.databaseaccess.DatabasePlatform.executeBatch(DatabasePlatform.java:2127)
at
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeJDK12BatchStatement(DatabaseAccessor.java:871)
... 40 more