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 ('dc518077ed1fcd82502b12ea5a0d7759', -1, 1713627151, 1713627151, '1277f814', -1, 0, 0)

Line : 187
File : sessions.php