Hi,
I am using Providence 2.0 but I've had the same problem with Providence 1.7. I have two established administrator users but when I add a third user I am not able to login with their account, edit their account or delete it. If I try to make a fourth account, I get the error message "Duplicate entry '0' for key 'ca_users.PRIMARY'". Adding a new user always to tries to create a user_id that equals 0 in MySQL. I am using PHP8.2 and MySQL 8.0. I appreciate any help you can provide with this problem. Thank you!