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) VALUES ('8e6b2bfa0b97ecc5c345945e2b4f8965', -1, 1714400775, 1714400775, '038a7a04', -4, 0)

Line : 158
File : sessions.php