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 ('8ab471a10c36b33c4ca6b51bccfacc10', -1, 1713468806, 1713468806, '2cd463d0', 0, 0, 0)

Line : 187
File : sessions.php