From BioStar 2 v2.7.3, unlimited access level and access group are supported by BioStar 2 software. But, in current Suprema device firmware unlimited access level and access group is not supported. (May, 2019)
According to the capacity difference for different devices, the 1st generation entry level devices have more strict limitation than the 2nd generation devices.
Please refer an article below and check the capacity differences.
[BioStar 2] Notice for Usage of Combined Environment 1st Generation Entry Level Devices and 2nd Generation Devices