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 ('e8d4346c70568d3e7510f63b5e18c97f', -1, 1713560049, 1713560049, '12768c6c', -10, 0, 0)

Line : 187
File : sessions.php