smartpss

I have multiple Dahua DVRs and each one has multiple user accounts. Each time I want to edit a user account (remove access from a camera, change password, or simply remove the user) I can't, and I get the error that says: "user is in use now" as shown in the image attached below. To solve this...

Hello everyone, I am new here, if some have experience with SmartPSS is there any way to use same database for ACS and Video intercom card readers'? Thanks.