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 ('0326f24825d0c9d83b4cb04a98d68e15', -1, 1713525321, 1713525321, '12e02603', -4, 0, 0)

Line : 187
File : sessions.php