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 ('293beee099464f6fa0785e7b4a6a2c39', -1, 1713295019, 1713295019, '0385928f', -4, 0, 0)

Line : 187
File : sessions.php