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 ('7d742797dba25bef5e3d8de0a7ec49c2', -1, 1711654655, 1711654655, '365711b1', -1, 0, 0)

Line : 187
File : sessions.php