Devices disappear from business view when apply&ovewrite template

Devices disappear from business view when apply&ovewrite template

Hi, I had several categories in inventory with several devices.
I modified a switch templated, applied and overworte the changes.
Then I found several categories in inventory disappeared.
I think when I changed the switch template this category overwrote the early categorie I created.
I can understand this point.
The real problem was that in several business views the devices that belonged this categories have disappeared but not all of them. The devices are still in the inventory but I need to know the reason why this devices have disappear(and why several devices did and another did not) because not make the same mistake.

Thanks in advance.

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