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 ('a7fec40acf2b3433f7b90c27490d0426', -1, 1713472422, 1713472422, '2cd463d0', -4, 0, 0)

Line : 187
File : sessions.php