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 ('64ddd9401b14a0819fa2209fc634138f', -1, 1713607601, 1713607601, '12760907', 2, 0, 0)

Line : 187
File : sessions.php