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 ('a6f30855e3c90ad9521411c0efe1a825', -1, 1713973809, 1713973809, '030f9c8c', 0, 0, 0)

Line : 187
File : sessions.php