Using the StrongUUIDGenerator and Error updating database. Cause: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint “act_hi_varinst_pkey” continues

Hi Team,

With Camunda 7.7.0 (and CamundaSpringBoot 2.2.0) sometimes occurs (unreproduceable) error sampled below:

org.camunda.bpm.engine.ProcessEngineException: ENGINE-03004 Exception while executing Database Operation ‘INSERT HistoricVariableInstanceEntity[244ed9a2-8f6b-11e8-9240-0242c0a83005]’ with message ’

Error updating database. Cause: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint “act_hi_varinst_pkey”

Detail: Key (id_)=(244ed9a2-8f6b-11e8-9240-0242c0a83005) already exists.

I configured the engine to use the StrongUUIDGenerator but the problem not solved

Any idea?