Duplicate process InstanceId

Is there any possibility that , The Process instance Id can be duplicate?
My Model is quite simple , comprises of only Timers,DMN,HTTP Service and Receive task.

Also I just have one bpmn in my spring boot Flowable project.

Have you had a problem with a duplicate Process instance id?

If you are using Flowable 6.4.0 or newer version then the default IdGenerator is the StrongUuidGenerator, which generates UUID as ids.