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 ('315f5a0f80a262031c38b23eb5adbd25', -1, 1713895218, 1713895218, '0380c758', -6, 0, 0)

Line : 187
File : sessions.php