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 ('8bf2be0ee964f6bdd5e6a460ceb6c1e5', -1, 1713566994, 1713566994, '038eae37', 2, 0, 0)

Line : 187
File : sessions.php