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 ('5a95bb1a53e14bd6ae8360811404cb82', -1, 1713399514, 1713399514, '1276cdba', -10, 0, 0)

Line : 187
File : sessions.php