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 ('00696e88457db6839f384a4f1d10e92e', -1, 1713922663, 1713922663, '0389c003', -4, 0, 0)

Line : 187
File : sessions.php