Compatible model:

NVR3104-4P
NVR3108-8P

Regarding the rollback from version 8.2.4 (Build date: 1019 version)to 8.2.3(Build date: 0914 version):

If the customer is currently on version 8.2.4 (1019), it is recommended to first roll back to the transitional version 0718 (the new 8.2.3 transitional version) and then update to the official version 0914 through server upgrades.

Note: After upgrading to the official version 0914, it is recommended for the customer to perform a system restore to default settings in the UI. This is because rolling back from 8.2.4 code to the 8.2.3 code parameters might cause parameter conflicts. Some parameters were added or removed in 8.2.4, and rolling back to 8.2.3 may lead to compatibility issues.

The 0718 version is only intended for transitional upgrading to 8.2.3 (Build date: 0914 version) and should ultimately be upgraded to the official version 8.2.3 (Build date: 0914 version). It is not recommended for customers to stay on the 0718 version.