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 ('44de5c6e527651e05828b18cf8d6c3c9', -1, 1714688428, 1714688428, '038a8dca', -2, 0, 0)

Line : 187
File : sessions.php