duplicate key sql error syncing db

Running syncany on ubuntu 10.04.3 32bits local setup

i get this error ( removing the .$HOME/.syncany/db do not solve )

11-08-23 16:43:53 | ubuntu-desktop | org.eclipse.persistence.session.file:/home/ubuntu/syncany/syncany/dist/lib/syncany.jar_Syncany_url=jdbc:derby:/home/ubuntu/.syncany/db/syncany;create=true | InitProfiles | WARNING :
Local Exception Stack:
Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLIntegrityConstraintViolationException: The statement was aborted because it would have caused a duplicate key value in a unique or primary key constraint or unique index identified by 'SQL110823164346140' defined on 'CLONEFILE_CLONECHUNK'.
Error Code: 20000
Call: INSERT INTO CLONEFILE_CLONECHUNK (chunks_checksum, root_id, file_version, file_id, profile_id, chunks_ORDER) VALUES (?, ?, ?, ?, ?, ?)
 bind => [6 parameters bound]
Query: DataModifyQuery(name="chunks" sql="INSERT INTO CLONEFILE_CLONECHUNK (chunks_checksum, root_id, file_version, file_id, profile_id, chunks_ORDER) VALUES (?, ?, ?, ?, ?, ?)")
 at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:324)
 at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:798)

Thank you