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) VALUES ('3f42d7d51a6ae39a849e3c8b6b94a02f', -1, 1714256903, 1714256903, '12de234d', -8, 0)

Line : 158
File : sessions.php