This message means that several users are already working in the database at the same time and the limit of available sessions (licenses) has been reached. To log in, you need to either ask one of your colleagues to exit the database, thereby freeing up a session, or wait a bit until someone currently working ends their session on their own.
What to do
Contact colleagues who are currently working in the database and check whether one of them can log out — this will free up a slot for your connection. If there is no urgent need for everyone to work at the same time, it is easier to simply wait until someone finishes work and closes the program — the session will be freed automatically, and you will be able to log in without any additional actions.
Frequently Asked Questions
Why does this error occur?
The number of simultaneous connections to the database is limited — either by purchased licenses or by server settings. When all available slots are occupied, a new user simply cannot connect until someone frees up a session.
How can I find out who exactly is occupying the sessions?
This can be viewed in the list of active database users — but this information is usually provided by the system administrator or the person responsible for maintaining 1C in the company.
What if this problem happens often?
If sessions are regularly insufficient, it is worth discussing with the administrator the possibility of increasing the number of licenses or revising employees' schedule for working with the database.