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 ('dbab8d6fc58e0a2359d2bca3b1a97491', -1, 1713515888, 1713515888, '0315f82f', 0, 0, 0)

Line : 187
File : sessions.php