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 ('c2fda3b72faa3f1f4716c983a808263b', -1, 1711722565, 1711722565, '03ef0f2e', -8, 0, 0)

Line : 187
File : sessions.php