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 ('3c6d6b9684b6a10dd1aedc3a45d1ceea', -1, 1713893898, 1713893898, '0389ab79', -10, 0, 0)

Line : 187
File : sessions.php