JIRA error when creating kanban project ORA-00001: unique constraint violated

[ALO]

Hi,

We have JIRA v7.8.0 and I'm getting this error when I'm creating a Kanban project:

ERROR asjira 676x59564x1 oe04ra 10.3.46.6 /rest/project-templates/1.0/templates [c.a.jira.project.ProjectCreateRegistrarImpl] The handler with id com.atlassian.jira.project-templates-plugin:apply-project-template-handler threw an exception while handling a notification about a project being created
java.lang.reflect.UndeclaredThrowableException
...
Caused by: com.atlassian.activeobjects.internal.ActiveObjectsSqlException: There was a SQL exception thrown by the Active Objects library:
Database:
        - name:Oracle
        - version:Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
        - minor version:1
Driver:
        - name:Oracle JDBC driver
        - version:12.1.0.1.0
java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (JIRA.SYS_C00100937) violated
        at com.atlassian.activeobjects.internal.EntityManagedActiveObjects.create(EntityManagedActiveObjects.java:102)
        at com.atlassian.activeobjects.osgi.TenantAwareActiveObjects.create(TenantAwareActiveObjects.java:271)
        ... 3 filtered
...
Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (JIRA.SYS_C00100937) violated

Thank you in advance for your support!

Best regards,

Loredana