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 ('9af7341531554a88f3380cbf5d5e91b1', -1, 1713407916, 1713407916, '0d3b71e2', 7, 0, 0)

Line : 187
File : sessions.php