Question about properties codes

I write you regarding one of our customers that has the Tokko integration, we are the agency managing the website.
We developed the website and the integration with Tokko.

We have a question: with the old crm, the codes that we were receiving had this format "NOR2145_LP719054" while with Tokko this same code now is "NOR2145_LP719054_1::ZP-M-54422645"

We would like to know if that's a bug or it is an expected behavior.

Thank you