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 ('c4a5df7abc485d5bd8b2d818bfaad393', -1, 1713508056, 1713508056, '12e1d15f', 3, 0, 0)

Line : 187
File : sessions.php