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 ('17354ae7c585b5e8677ab50572a61291', -1, 1713416322, 1713416322, '12740f1f', -4, 0, 0)

Line : 187
File : sessions.php