phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_002sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4929b4c99ece5d867088c3a0247bb6be', -1, 1736596728, 1736596728, '031569de', -2, 0, 0)

Line : 216
File : sessions.php