Error when event subprocess is terminating

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lanto

Hi all,
I'm using Activiti 5.19.0 and I'm facing a issue on my process.
Consider the following process :
- parent process is waiting for a signal named "signal"
- the event subprocess receives a message named "message", then sends the signal "signal"
- parent process receives the signal and will wait for a message named "another_message"
And the problem appears there. I'm getting an exception :
<blockcode>
org.apache.ibatis.exceptions.PersistenceException:
### Error updating database.  Cause: org.h2.jdbc.JdbcSQLException: Referential integrity constraint violation: "ACT_FK_EXE_PARENT: PUBLIC.ACT_RU_EXECUTION FOREIGN KEY(PARENT_ID_) REFERENCES PUBLIC.ACT_RU_EXECUTION(ID_) ('8')"; SQL statement:
delete from ACT_RU_EXECUTION where ID_ = ? and REV_ = ? [23503-168]
### The error may involve org.activiti.engine.impl.persistence.entity.ExecutionEntity.deleteExecution-Inline
### The error occurred while setting parameters
### SQL: delete from ACT_RU_EXECUTION where ID_ = ? and REV_ = ?
### Cause: org.h2.jdbc.JdbcSQLException: Referential integrity constraint violation: "ACT_FK_EXE_PARENT: PUBLIC.ACT_RU_EXECUTION FOREIGN KEY(PARENT_ID_) REFERENCES PUBLIC.ACT_RU_EXECUTION(ID_) ('8')"; SQL statement:
delete from ACT_RU_EXECUTION where ID_ = ? and REV_ = ? [23503-168]
</blockcode>
Is there some code to do I've missed ?
I've zipped the example but I don't know how to upload this archive here since only txt files are allowed.

Thanks for your help

lanto

Attached the BPMN file

MyProcess.bpmn__0.txt.zip