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 ('7d6556b4cf6a1fb57b6b0af35c0c1def', -1, 1714759730, 1714759730, '12d9960b', -4, 0)

Line : 158
File : sessions.php