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 ('351b6fca360b4a11d9292a4ef4609e52', -1, 1711673881, 1711673881, '2ccb3a84', -4, 0, 0)

Line : 187
File : sessions.php