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 ('9d578b45aa89e5744eb96f721e7d85eb', -1, 1713921714, 1713921714, '038ff453', -1, 0, 0)

Line : 187
File : sessions.php