phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('56ea3410bb4e528936f9e9408afbeff5', -1, 1713527335, 1713527335, '0390faa9', 2, 0, 0)

Line : 187
File : sessions.php