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 ('8f2e705d6c75e9b3d68b399ffa29b015', -1, 1730418422, 1730418422, '12771317', 14, 0, 0)

Line : 195
File : sessions.php