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 ('75e9c0bc368f6cd5591f5de4e3cf577f', -1, 1713502538, 1713502538, '0385985f', 4, 0, 0)

Line : 187
File : sessions.php