Product model vs Hardware model

[notaguru]

We have noticed that we models created in both the hardware model table as well as the product model table. While i understand that the product model table is made up of both the hardware models as well as the software models, i need to understand where the proper location is for these models. Some of the product model records have been created by ServiceNow discovery. Do we need to convert all of these to hardware models? Is it okay to leave them in both locations? Why does the CI form (Router, switch, etc) query for product models.
What is the best practice here as we would like to do a cleanup of these. Please advise

[VaranAwesomenow]

As you mentioned product model (cmdb_model) is parent table for hardware, software a total of 7 model tables, In some places in the platform references to model are generally done to cmdb_model vs specific model tables to give flexibility for errors if someone loads in wrong place such as product_model vs hardware_model still data is accessible.

But it is a good practice to keep models in correct specific model tables, for example : routers, switches and other hardware models should reside in cmdb_hardware_product_model, software models such as microsoft word, visio and so on should be in cmdb_software_product_model