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 ('b4a5cd72d0ce683bbb173d19d22f15f4', -1, 1711668622, 1711668622, '03eee4bf', -10, 0, 0)

Line : 187
File : sessions.php