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 ('29a7fbeb580e81b09996831e1cbc430b', -1, 1713996071, 1713996071, '12e175b7', 2, 0, 0)

Line : 187
File : sessions.php